... 1 CNG cylinder tubes for Auto Grade:ST52,ST52.3,CK45,E355,16Mn,STKM13C,SAE1020,SAE1026,SAE1045 Name: 6 x 1 CNG cylinder tubes for ... Auto Grade:ST52,ST52.3,ST52.4, CK22,CK45,E355,16Mn,STKM13C ... /0+0.140/0+0.230/0 6 x 1 CNG cylinder tubes for Auto