You are purchasing the spray equipment shown in the pictures....I do not know how the spray equipment operates but I can tell you I energized the JC PENNY MOdel 5200 compressor and it puts out air. As far as the canisters I cannot tell you how they work you will have to test for yourself. For these reasons I am selling as is. If you have questions or need pictures I will be happy to answer or send more pictures. One of the Paint Sprayers says Craftsman, and one Says MARCO, the other one does not have ID. There is also an Air hose included. ALSO included is a detail paint sprayer from CENTRAL pneumatic, and a second set all look new!!!!!! Please review pictures, AS is, some new some used very good condition but I cannot test to confirm. Please ask questions or ask for more pictures if neededBuyer pays 39.99 for USA shipping accept to HA, PR, Alaska which will cost extra. Overseas okay through shipping. I am a disabled US Veteran and appreciate your business. USPS has been slow in deliveries even if I send Priority mail! ALSO.....I do not make money from shipping charges, if the cost is less I will refund you difference, if it is more I will eat differences and not charge extra!!!!!!