... ,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,SAE1020,SAE1026,SAE1045Standard: DIN2391ID: ... or fixed length as customers' requirementSurface: 0.2 - 0.4µTolerance: ID(mm)Tolerance(mm)H7H8H9H10<=30+0.021/0 ... 089/0+0.140/0+0.230/0 6 x 1 CNG cylinder tubes for Auto