Olli™ flex 900 M Ø50

Easysea Olli Flex 50 M modular sailing block in single configuration, front view on white background
Olli Flex 50 M block at 45 degrees showing the anodised aluminium cheeks and the POM sheave
Olli Flex 50 M block with a braided line running through the sheave, front view
Line running through the Olli Flex 50 M block, seen from above along the sheave groove
The two Olli Flex sizes side by side, 50 M and 60 L, on white background
Olli Flex 50 M in double configuration, two sheaves stacked on the same body, front view
Olli Flex 50 M double block at 45 degrees with the stainless shackle head
Olli Flex 50 M in triple configuration, three sheaves on the same body, front view
Olli Flex 50 M triple block at 45 degrees showing the three stacked sheaves
Olli Flex 50 M double block hanging from the twin stainless shackle head
Olli Flex 50 M double block assembled with the stainless shackle, front view
All the parts of the Olli Flex 50 M triple configuration laid out: three cheeks, two sheave spacers, the stainless shackle and the through bolts
Exploded view of the Olli Flex 50 M block: body, openable cheek and stainless shackle
The two openable cheeks of the Olli Flex 50 M, the feature that lets the block be reconfigured
The self-lubricating POM sheave of the Olli Flex 50 M next to the machined aluminium body
The three components of the Olli Flex 50 M laid out: cheek, POM sheave and body
Detail of the sheave axle bolt being fitted into the Olli Flex 50 M body
Olli Flex 50 M single block next to the conversion kit parts, the shackle head and the long through bolt
Two Olli Flex 50 M blocks with the stainless shackle and the two bolts needed to join them
Olli Flex 50 M double block held in one hand next to the shackle head and the through bolt
Olli Flex 50 M double block held by the twin stainless shackle head, showing how compact it is
Fitting the stainless through bolt into the Olli Flex 50 M double block by hand
Assembling the Olli Flex 50 M double block with a hex key and a driver, no special tooling needed
Olli Flex 50 M double block with the hex key, the ratchet, the shackle head and the through bolt used to reconfigure it
Separating the stacked cheeks and sheaves of the Olli Flex 50 M by hand to change configuration
Removing the through bolt from the Olli Flex 50 M triple block with the hex key supplied
Olli Flex 50 M triple block with the hex key and ratchet used to assemble it, front view
Tightening the Olli Flex 50 M triple block with a ratchet, showing the reconfiguration in progress
Technical data of the Olli Flex 50 ST M: 50 mm POM sheave, 12 mm maximum line diameter, AISI 316 omega shackle, 900 kg working load and 226 g weight

Olli™ flex 900 M Ø50

Sale price€79,00 EUR
New
Launch offer · 15% off

One block with endless uses that replaces a whole drawer of fittings. Reconfigure it from single to double to triple with the Conversion Kit, hanging or mounted on deck.

SizeØ50 · M
Ø50 · Mlines up to 12 mmØ60 · Llines up to 14 mm
LoadStandard · 900 kg max
Standard900 kg maxHigh Load1700 kg max

In stock

Estimated delivery: Mon 10 Aug – Wed 12 Aug

Secure transaction Sold by easysea®

Before you order

  • 3-year warranty
    Full cover on material and manufacturing defects. No registration needed. With easysea +care you add 3 more years, 6 in total.
  • 30-day returns
    If it is not right you send it back, even fitted. Full refund.
  • Tracked shipping
    Tracking on every order. Free shipping over €99 .
One block, 6+ uses: turning blocks, tackles, quick rigs
From one to three: reconfigure with the Conversion Kit
Fewer parts, more reliable: self-lubricating, no metal bearings
Marine-grade build: 6061-T6 aluminium · AISI 316
Free shipping on orders over €349 · ships in 24 to 72h3-year warranty · secure encrypted checkout

One block, every job

Olli Flex single block with the line running in the sheave

Hang it and go

On its own, hanging from the included stainless omega shackle: a turning block ready in seconds, wherever you need it. No kit required.

The two openable cheeks of the Olli Flex block

Opens on a loaded line

No need to unreeve the sheet: open the body, drop the line in, close it. Even with the rig in place.

Olli Flex in double configuration

Double: 2:1 tackle

Two identical bodies joined by the kit: a 2:1 tackle for the vang, traveller or barber hauler, using the line you already have.

Olli Flex in triple configuration

Triple: maximum purchase

Three bodies, three sheaves, the same kit: maximum purchase for the hardest jobs, always re-configurable.

From one, to three

Two identical blocks and one Conversion Kit make a 2:1 tackle. Three make a triple. It goes together with common hand tools in a few minutes, and comes apart just as easily.

  1. Two Olli Flex blocks with the shackle and the bolts from the Conversion Kit
    1

    Stack the bodies

    Line up two or three identical Olli Flex bodies with the sheaves in between.

  2. The kit through bolt being fitted into the double block
    2

    Run the bolt through

    The long stainless bolt from the Conversion Kit passes through the whole stack.

  3. Assembling the Olli Flex double block with a hex key
    3

    Tighten and go

    Hex key and socket wrench. Fit the shackle head and the block is ready.

All the parts of the Olli Flex Conversion Kit

Everything in one Conversion Kit

One kit covers double, triple and flat deck mounting. You need a single kit per configuration, matching the block size and load class.

See the Conversion KitAssembly instructions (PDF)

How many do you need?

Olli Flex single block, 45 degree view

Single

Flying lead, barber hauler, utility block. Hanging from the shackle, or flat on deck with the kit.

1× Olli™ flex 900 M Ø50

€79,00Add all
Olli Flex double block, 45 degree view

Double 2:1

Vang, traveller, adjustment tackles.

2× Olli™ flex 900 M Ø50
1× Olli™ flex Conversion Kit M

€189,00Add all
Olli Flex triple block, 45 degree view

Triple

Maximum purchase for the highest loads.

3× Olli™ flex 900 M Ø50
1× Olli™ flex Conversion Kit M

€268,00Add all

Each configuration needs just 1 Conversion Kit matching the block size and load class.

Which one is for you?

Size follows your line diameter. Load class follows the job.

SpecificationM · Ø50L · Ø60
SheaveØ50 mm · POMØ60 mm · POM
Max line12 mm14 mm
Working load900 kg1.800 kg
Breaking load1.400 kg2.700 kg
Omega shackle6 mm AISI 3168 mm AISI 316
Weight226 g302 g

Figures for the Standard version.

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Standard

POM sheave, grey

Technical self-lubricating POM sheave, light and quiet. For sheets, control lines and everyday running rigging.

900 – 1.800 kg

High Load

6061-T6 sheave, black

Aluminium 6061-T6 sheave and a larger omega shackle: up to twice the rated load on the same line diameter. For racing, primary sheets and halyards.

1.700 – 3.400 kg

Both versions share sheave diameter, max line diameter and mounting, so you can mix them in the same modular setup.

Technical details

Specifications
SizeM · Ø50
Sheave diameter50 mm / 1.97 in
Sheave materialPOM
Max line diameter12 mm / 0.47 in
Omega shackle6 mm · AISI 316 stainless
FinishGray soft anodized
Thickness28.4 mm / 1.12 in
Working load900 kg / 1,984 lb
Breaking load1,400 kg / 3,086 lb
Weight226 g / 8.0 oz
Download the datasheet (PDF)
Warranty & returns
3-year warranty on every easysea® product. 30-day money-back guarantee.
Shipping
Free shipping over €99 . Worldwide express delivery.

FAQ

Can one block really do so many jobs?
Yes. A single Olli Flex covers turning blocks, tackles, quick rigs and temporary installs — 6+ applications. It replaces a drawer of single-purpose fittings.
How do I turn one block into a double or triple?
Add the matching Conversion Kit (sold separately, one per size and load class). It joins identical Olli Flex blocks into double and triple configurations with a few common hand tools.
What’s the difference between Standard and High Load (HL)?
HL versions use a 6061-T6 aluminium sheave instead of POM and a larger shackle, raising the working load on the same line diameter (e.g. 900 to 1,700 kg on Ø50).
Which size do I need?
Ø50 (M) takes up to 12 mm line, Ø60 (L) up to 14 mm. Match the size to your line and the working load to your application.
Does it need maintenance?
Very little. The self-lubricating sheave runs without metal bearings, so there is nothing to seize or corrode — just rinse with fresh water after use.
What makes it “openable”?
The interlocking aluminium bodies rotate against each other, so you can open the block onto a line already under load — handy, but the real advantage is reconfiguring one block into many setups.

Build your system

Standard and High Load blocks, plus the Conversion Kits for deck, double and triple setups.

YOU ARE HERE
Olli™ flex 900 M Ø50

Olli™ flex 900 M Ø50

€79,00

Olli™ flex 1800 L Ø60

Olli™ flex 1800 L Ø60

€95,00

Olli™ flex HL 1700 M Ø50

Olli™ flex HL 1700 M Ø50

€99,00

Olli™ flex HL 3400 L Ø60

Olli™ flex HL 3400 L Ø60

€120,00

Olli™ flex Conversion Kit M

Olli™ flex Conversion Kit M

€31,00

Olli™ flex Conversion Kit L

Olli™ flex Conversion Kit L

€54,00

Olli™ flex Conversion Kit M HL

Olli™ flex Conversion Kit M HL

€37,00

Olli™ flex Conversion Kit L HL

Olli™ flex Conversion Kit L HL

€66,00

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