"Never pay lease or rent charges again Brand new industrial-grade welding gas cylinder has never been filled. Refillable and exchangeable. Provides approx 1 hr. burn time when matched with the same size acetylene cylinder, using an oxyacetylene cutting torch. Product Type Cylinder, Capacity cu. ft. 40, DOT Approved Yes, Diameter in. 7, Valve Type CGA 540 male, Compatible With Oxygen, Dimensions L x W x H in. 7 x 7 x 17. #2 size Empty Provides approx. 1 hr. burn time matched with same size acetylene cylinder using a #0 1/2in. cutting tip on oxyacetylene cutting torch"