75 cubic foot capacity steel acetylene cylinder with CGA510 valve installed. High-quality steel construction. Ships empty. Please note: Acetylene cylinders require a shell inspection every 10 years. They also require an initial porous filler inspection at 5-20 years from the date of the manufacturer. This test is to be done no sooner than 5 years and no later than 20 years from the date of manufacturer. The Shell inspection is marked with an 'S' and the Porous Fill inspection is marked with an 'F'. Color May Vary: Black, Gray, or Red.