Harken® recommends equipping every system with Carbo lead blocks for safe furling from the cockpit

MaterialsAnodized aluminiumWorking load (kg)800Weight (g)5A (mm)8B (mm)10C (mm)12D diameter (mm)25

Heavy duty mast heel plug for the Silver and School Optimist masts

superstructures on ships

Formed from high strength steels or stainless steels

Harken 22mm Upright Block 243 Harken CARBO AIR BLOCKS 57 MM Harken® recommends equipping every systemLow 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 (mm) 22 mm Sheave (in) 7 8 in Length (mm) 38 mm Length (in) 1 1 2 in Weight (g) 28 g Weight (oz) 1 oz Maximum line (mm) 6 mm Maximum line (in) 1 4 in Fasteners (mm) 5 RH mm Fasteners (in) #10 RH in Maximum working load (kg) 91 kg Maximum working load (lb) 200 lb Breaking load (kg) 544 kg