porthole Shackles and you don’t need to

and you don’t need to recut your sail

schools and institutions

Black Magic Air blocks are a top favorite of Big Boat performance racers and cruisers

while maintaining great sail shape

The weight of this high-strength block is only a few ounces

porthole Shackles and you don’t need toThese heavy duty satin anodized Portholes are CE Classified A1 suitable for use in the hull side. They have a 10mm Smoke Acrylic opening pane set in an aluminium frame. Fitted with friction hinges, permitting them to stay open in any position. Two large diameter knobs ensure that the Portholes can be closed completely watertight. Specifications: External: 344 x 198mm Internal Cut Out: 320 x 174mm Radius 87mm