Berges® Spring tension Pulley type F350b for use with wide belts type CW-b 70 and adjusting pulley R350b. Diameter of 346mm with length through bore 195mm, die cast aluminum sheave faces with steel slide hub. Identified by casting numbers x and x, one spring; castings used on other series of pulleys.. Maximum shaft diameter 48mm with standard bores listed for sale, alternative bores are available contact TVT for non-standard bore quotation.