Harken 45mm Aluminum Double Block Swivel Special Order Perko 5/8" Thru-Hull Connection f/

Perko 5/8" Thru-Hull Connection f/ use with Hose Bronze

Quick and simple

or held in place with a velcro strap

Works on open body turnbuckles and Johnson's positive locking

Harken 45mm Aluminum Double Block Swivel Special Order Perko 5/8" Thru-Hull Connection f/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. A center cage keeps Torlon roller bearings separated and parallel to reduce friction. Shackle blocks lock in two directions or swivel to keep line from twisting. Torlon is a registered trademark of Solvay