for US Continental orders over $99
Harken 57 mm Black Magic Blocks
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: mainsheet, runner, halyard, and spinnaker systems.
MAURIPRO Sailing, your direct access to Harken 57 mm Black Magic Blocks and all your other sailing and boating needs.