The perfect set up for your propellant can. Paasches air propellant blend does not contain C.F.C.s which harm the ozone layer. Includes 3B attachment and mini regulator. The mini regulator will help save air and make the can last longer. It will also prevent the can from freezing up and loosing pressure while working. Perfect for portability and air consumption. When the can is empty, just simply screw another can on.