DOT3AA certificated aluminum cylinder Type for ME,MD,20CF,40CF,60CF,80CF,125CF,125CF,7oz ... Mpa)Test pressure(psi/Mpa)MaterialMEDOT-3AL2015(4.38"--283in3)aluminum alloy4.38/111.25283/4.6425.93/6588.65/42015 ... /13.93360/23.26061MDDOT-3AL2015(4.38"--172in3)aluminum alloy4.38/111.25172/2.8216.71/4255.92/2 ... 72015/13.93360/23.26061 DOT-3AL2015(4.38"--89in3)aluminum alloy4.38/111.2589/1.459.81/2504/1. ...