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

🔄self-adjusting swivel attachment

⚙️22mm precision diameter

🛥️ultra-lightweight at 0.01 lbs

427 DH

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Sold byAmazon MoroccoDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛥️ Elevate your sailing game with precision and style!

SWIVEL SMART - Self-adjusting swivel attachment aligns perfectly with your pull direction every time.
SMOOTH OPERATOR - Ball bearing design ensures ultra-low friction for effortless line movement.
FEATHERWEIGHT CHAMPION - At just 0.01 lbs, it keeps your rig agile without compromising strength.
BUILT TO LAST A LIFETIME - Trusted by sailors for over 36 years, this block delivers bulletproof durability.
MICRO SIZE MEGA PERFORMANCE - Compact 22mm block engineered for seamless control on sailboards and dinghies.

The HARKEN Premium Sailing 22mm Boat Block is a compact, lightweight, and durable sailing hardware piece featuring a 22mm aluminum ball bearing block with a self-adjusting swivel. Ideal for sailboards and small dinghies, it offers smooth, low-friction performance trusted by sailors for decades.

Specifications

ASIN	B002NSQBXM
Bearing Number	233
Bearing Type	Ball Bearing
Best Sellers Rank	#64,541 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #10 in Sailing Hardware
Brand Name	HARKEN
Compatible Lubricant	Grease
Customer Reviews	4.6 4.6 out of 5 stars (54)
Included Components	1 Cheek Block
Item Dimensions	2.5 x 0.94 x 0.5 inches
Item Weight	4.54 g
Manufacturer	HARKEN
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	1 Year Warranty

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427 DH

Duties & taxes included

In stock

Sold byAmazon MoroccoDelivered 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 Morocco.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

Vikram D.

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

2 weeks ago

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