Berges® Spring tension Pulley type F150b for use with wide belts type CW-b 28 and adjusting pulley R150b. Diameter of 159mm with length through bore 90mm, die cast aluminum sheave faces with steel slide hub. Identified by casting numbers 1100314 and 1100315, one spring; castings used on other series of pulleys.. Maximum shaft diameter 28mm with standard bores listed for sale, alternative bores are available contact TVT for non-standard bore quotation.