Barton plain bearing blocks have a precision moulded acetal sheave running on a large diameter brass bearing, ensuring free running under the highest of loads. Single 70mm x 20mm (2 3 /4 x 3/4") Fiddle 44/70mm x 17mm (1 3 /4 x 2 1/4" x 5/8") Max rope diameter 14mm ( 9 /16") SWL 1250Kg (2750 lbs) Break load 2500Kg (5500 lbs)