Barton Size 2 Ball Bearing Block Double Fix EyeA strong lightweight block for use on dinghies and dayboats or as lead blocks on larger boats. Sheave size: 35mm x 12mm (1 3/8 x 15/32inch) Fiddle: 30/34mm x 12mm (1 3/16inch / 1 3/4inch x 15/32inch) Max rope diameter: 8mm (5/16inch) SWL: 370kg (815lbs) Break load: 740Kg (1630 lbs) Length: 79mm Weight: 77g