Barton Size 0 Ball Bearing Block Double Swivel & Becket 10231

A strong, lightweight block ideal for use on dinghies and dayboats or as lead blocks on larger craft. Sheave size: 20mm x 8mm (25/32 x 5/16")Max rope diameter: 5mm (3/16") SWL: 275kg (606lbs)Break load: 550Kg (1210 lbs) Length: 79mmWeight: 42g