... wall thickness:5.4mm best quality&service DOT-3AA cylinderMaterial:30CrMOStandard: DOT-3AAVolume:43.3L(2640inches)weight:52kglength:1305mmwall ... can manufacture cylinders conforming to ISO11439, EN1964,JISB 8241, DOT-3AA, GB5099, GB17258, GB24160, etc. We have received international ... approvals from BV, DOT-3AA,TUV, DEKRA, SGS and so on. CQYF products ...