"This ready-to-fill #2 Argon welding gas cylinder ensures that you never have to pay lease or rent charges again. This brand new industrial-grade welding gas cylinder has never been filled. Refillable and exchangeable. U.S.A. Dimensions L x W x H in. 7 x 7 x 17, Diameter in. 7, Product Type Cylinder, Compatible With Argon gas, Capacity cu. ft. 40. Ideal when using Argon gas in MIG stainless steel or aluminum or TIG carbon steel welding applications #2 size Approx. burn time of 3-hrs./fill"