Convertech 6" Dia Air Chuck Web Roller Expanding Shaft Adapter Assembly Shaft size is 1-1/2" Diameter Adapter is 6" in Diameter The expanding part of the adapter is 19-7/8" long The total length including collar is 23-1/2" Length black end to black end is 22-1/2" Part was installed but is unused without packaging.They were installed on a web lamination unwind module that was never put into service. The machines were still new in crates when we purchased them. We are in the process of parting them out and will be listing the different systems and parts from them. This part came off the machine shown in pictures.