Single bottle cart with exclusive one hand overcenter latching. No more rattling chains or questionable securement. Comes with 80 cubic foot Owner/Exchange tank for C25 MIG or argon. Cart is perfect for storing that bottle of argon needed for occasional aluminum jobs. Or supplying CO2 or C25 for your suitcase feeder when GMAW. (Mig) You won't find a nicer designed unit and price is firm at $$300.