Ronstan 30mm BB Single Block with becket can be used for: Primary lead blocks on dinghies and catamarans Control lines on larger yachts It features: Low friction 2-stage ball bearing system provides consistent performance over the full working load range. High static and dynamic load capacity. Light weight Versatile head fittings Sheave Ø 30 mm Max. Rope Ø 8 mm Max. Cable Ø - mm Pin Ø - mm M.W.L. 300 kg B. L. 750 kg Weight 34 g