ERW tubes of cardan shaftsStandard:OD 76mm-140mm        Wall thickness 2.5mm-8.0mm        Inside diameter permit tolerance 71-124mm 0.2-0.3mm        Length 3.5-8.5mm        Dimensions and Tolerance :outside diameter 76-140mm                               The height of inside flash -0.05+0.2mm                               The degree of roundless 0.40mm