This spring compressor consists of the head stock, center support, and tail stock for a 3/4 pipe. The pipe must be threaded on at least one end and is not supplied as part of the compressor. It will accept 1 inch wood dowels so the customer can make custom adapters for specific guns. It can also be used as is for some models. We have fould that the pipe and vise should be covered with a large soft towel to protect the gun.