SKU: SFBoomBlockUpgradeKit Sunfish / ISCA Ball Bearing Boom Block Upgrade, Harken

Upgrade your old Sunfish / ISCA lower boom with these new ISCA class legal Harken ball bearing blocks. These modern Harken blocks use ball bearings to reduce friction in the mainsheet system to make sheeting easier. With this complete kit you can easily bring your Sunfish into the modern era.

The included blocks are ISCA class legal for all levels of racing.

Boom Block UPgrade Kit Includes:

• Harken Ball Bering Fixed Forward Block
• Harken Ball Bering Swivel Rear Block
• 3 x Rivets