PBT-1 1/2 CS Pipe-Mounted Ball Transfer Unit - 1-1/2" Main BallPBT 1 1 2 CS Pipe Mounted Ball Transfer 1 1 2" Carbon Steel Ball Made in the USA The PBT 1 1 2 CS is a pipe mounted ball transfer unit with a 1 1 2" main carbon steel ball that glides on ninety 3 16" support balls. Designed to mount on a 2" pipe pedestal, its ideal for use in front of shears, press brakes, and material handling tables where repositioning heavy loads is essential. Main ball diameter: 1 1 2" Housing and ball material: Carbon steel Load