Harken 40mm Carbo Double Block with Swivel Shackle Head Ai_Description the Aero Boots are suitable

the Aero Boots are suitable for dinghy sailing

Sheave 40 mm Length  75 mm Weight  44 g Maximum Line  10 mm  Maximum Working Load  220 kg Breaking Load  735 kg

with an adjustable strap over the top of the foot for ankle support

Internal width - 8mm

4 way stretch

Harken 40mm Carbo Double Block with Swivel Shackle Head Ai_Description the Aero Boots are suitableLow friction Carbo Air blocks are lightweight, strong, reliableand affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have very high working loads for safe, easy trimming. Sheave 40 mm Length 94 mm Weight 86 g Shackle Pin 5 mm Maximum Line 10 mm Maximum Working Load 440 kg Breaking Load 1080 kg