Except for rollers, Is the 22mm all stainless. Are the ball bearings sealed. I want to use it off shore

The best I can tell they are all stainless except rollers. I can't answer about the bearings but I have used mine on my Hobie 16 for years in a saltwater environment and so far they have performed flawlessly. Hope this helps.

What is the diameter of the mounting holes?

The mounting holes are .20" or 5.17mm

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HARKEN Premium Sailing 22mm Boat Blocks

Product ID: 24933528

Details

Bearing Number
233
Brand
HARKEN
Item Weight
4.54 g
Item dimensions L x W x H
2.5 x 0.94 x
Material
Nylon

🔄low-friction free-running

⚙️22mm compact size

🛥️ultra-lightweight 4.54g

NT$1378

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Sold byAmazon TaiwanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛥️ Glide through your sailing season with HARKEN’s featherlight precision!

BUILT TO LAST - Stainless steel sideplates provide robust strength, combining lightweight design with industrial-grade resilience.
FEATHERWEIGHT STRENGTH - At just 4.54 grams, these blocks deliver maximum durability without weighing you down.
UV RESISTANT DURABILITY - Derlin ball bearings stabilized with carbon black ensure long-lasting performance under harsh sun exposure.
VERSATILE SAILING ESSENTIAL - Perfectly sized at 22mm for dinghies, sailboards, and lightly loaded control lines on boats of any size.
EFFORTLESS CONTROL EVERY TIME - Micro blocks engineered for silky-smooth, low-friction performance on all your sailing lines.

The HARKEN Premium Sailing 22mm Boat Blocks are ultra-lightweight, low-friction micro blocks designed for smooth, efficient line control on dinghies, sailboards, and boats of all sizes. Featuring UV-stabilized Derlin ball bearings and stainless steel sideplates, these compact 22mm blocks combine durability with featherlight performance, making them an essential upgrade for any sailing enthusiast seeking precision and reliability.

Specifications

ASIN	B002NSQBXM
Bearing Number	233
Bearing Type	Ball Bearing
Best Sellers Rank	#112,749 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #28 in Sailing Hardware
Brand	HARKEN
Brand Name	HARKEN
Compatible Lubricant	Grease
Customer Reviews	4.6 out of 5 stars 54 Reviews
Included Components	1 Cheek Block
Item Dimensions	2.5 x 0.94 x 0.5 inches
Item Weight	4.54 g
Item dimensions L x W x H	2.5 x 0.94 x 0.5 inches
Manufacturer	HARKEN
Material	Nylon
Material Type	Nylon
Model	233
Number of Items	1
Outside Diameter	22 millimeters
Part Number	233
Specification Met	Aluminum
UPC	097653008477
Unit Count	1 Count
Warranty Description	See manufacturer's website for details

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NT$1378

Duties & taxes included

In stock

Sold byAmazon TaiwanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Taiwan.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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I loved the variety of products available. Will definitely shop again.

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

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