Harken's 25mm (1 in.) Wire Sheave is designed for sailors to use in custom applications. This is a Hard Lube-anodized aluminum sheave riding on high-load composite bearings. It is designed to be used with wire with a maximum diameter of 3/32 in. (2mm) and has a maximum working load of 1,000 pounds (454kg). It can also be used with 5/32 in. (4mm) rope.