is particulary suitable for the mainsheet control on boats up to
40' (12.19m). All sheaves are made from Antal HRM (High Strength)
resin with 2 races of ball bearings.
The 7:1 Mainsheet system is fitted
with 2 Antal OPF Blocks to connect to the boom, 1 main block with
cam cleat and swivel coupling to the main car, and a double swiveling
OPF block connected to the main block.