... : API SPEC 5D 2 material:41 30X,E75,G105,S135 3 OD:60.3-168.3mm 4 WT:6. ... -168.3mmWall thickness:6.45-111.4mmMaterial: 41 30X,E75,G105,S135 Tolerance: meet the standard or according to the international ... production process is made under the ISO 9001:2008 strictly g105 drill tube