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 Sheave Ø (in) 7/8 in Length (mm) 89 mm Length (in) 3 1/2 in Weight (g) 57 g Weight (oz) 2 oz Shackle pin Ø (mm) 5 mm Shackle pin Ø (in) 3/16 in Maximum line Ø (mm) 6 mm Maximum line Ø (in) 1/4 in Maximum working load (kg) 159 kg Maximum working load (lb) 350 lb Breaking load (kg) 544 kg Breaking load (lb) 1200 lb