HARKEN 100mm Aluminum Double Block — Swivel, 3248 Sailing Shackles & Swivels_Loups Sailors will appreciate the minimal

Sailors will appreciate the minimal stretch when the gloves get wet and how they dry soft to the touch

29 mm blocks feature a one-piece titanium outer race/sheave

Run multiple halyards and control lines aft from the mast to stoppers or winches for quick easy adjustment

Includes drive unit

HARKEN 100mm Aluminum Double Block — Swivel, 3248 Sailing Shackles & Swivels_Loups Sailors will appreciate the minimalBlack 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: mainsheet, runner, halyard, and spinnaker systems. Offered in 57 150 mm sizes, with low load versions in 57 and 75 mm ranges. A center cage keeps Torlon roller bearings separated and parallel to reduce friction. The sheave center carries the primary load,