Harken 75mm Aluminum Standup Block Harken Self Contained Sheaves the main halyard can be

the main halyard can be attached to the aft end of the boom and tightened for further support

Harken 76mm High-Load Single Midrange Block

the slide can often be inserted at the mast opening for the sail and dropped or lowered with a string

Larger boats than Maximum LOA Boat Outboard End - 43' and Maximum LOA Boat Inboard End - 36'

Harken 75mm Aluminum Standup Block Harken Self Contained Sheaves the main halyard can beHarken 75mm Aluminum Standup Block Black Magic Air blocks are a top favorite of Big Boat performance racers and cruisers. These lightweight, free running, powerful performers are used for sail controls that see lots of action. Sideplates and sheaves Hard Lube anodized for maximum UV protection and a smooth surface. Center cage keeps Torlon roller bearings separated and parallel to reduce friction. Torlon is a registered trademark of Solvay Advanced