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

48 liter buoyancy bags are slightly heavier than 43 liter buoyancy bags but after a capsize there is a lot less water in the boat

400 kg Weight 11 g

superstructures on ships

6mm thick plastic label

Harken 22mm Upright Block 243 Harken CARBO AIR BLOCKS 57 MM Heavy duty mast heel plugLow 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