Barton Size 0 Ball Bearing Block Stand Up 10170

A strong, lightweight block ideal for use on dinghies and dayboats or as lead blocks on larger craft. Features a tapered stainless steel spring for anti ~tumble action. Fastening centres: 28mmFastening diameter: 4mmSheave size: 20mm x 8mm (25/32 x 5/16")Max rope diameter: 5mm (3/16") SWL: 275kg (606lbs)Break load: 550Kg (1210 lbs) Length: 47mmWeight: 23g