Harken 40mm Carbo Double Block Fixed Tracking_Boardfy the Zhik range may be

the Zhik range may be a better fit

Sheave 75 mm Length  143 mm Width  64 mm Height  95 mm Weight  275 g Maximum Line  14 mm Maximum Working Load  340 kg Breaking Load 1100 kg

please look at the size guides and choose a smaller size than your usual

Machined 'Gill Grip' provides extra grip

Harken 40mm Carbo Double Block Fixed Tracking_Boardfy the Zhik range may beLow 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 89 mm Weight 80 g Shackle Pin 5 mm Maximum Line 10 mm Maximum Working Load 440 kg Breaking Load 1080 kg