Low-friction Micro blocks are compact and lightweight. They are ideal for sailboards, smaller dinghies, and lightly loaded control lines on boats of all sizes. Sheave Ø (mm)22 mm Length (mm)60 mm Weight (g)28 g Shackle pin Ø (mm)4 mm Maximum line Ø (mm)6 mm Maximum working load (kg)91 kg Breaking load (kg)544 kg