These systems are particularly suitable for the mainsheet control. All sheaves are made of HRM resin with 2 races of ball bearings. 2 sizes are available:
size 60: for boats up to 36 ft and lines up to Ø10 mm, main sheave with cam-cleat Ø60 mm, secondary sheave Ø50 mm, safe working load (SWL) = 800 kg;
size 75: for boats up to 40 ft and lines up to Ø12 mm, main sheave with cam-cleat Ø75 mm, secondary sheave Ø60 mm, safe working load (SWL) = 1000 kg.