Diameters: 200mm---1000mm Length: 3000mm--6000mm And up as customer? request. Steel Grades: CK45(DIN 1.1191); CK60(DIN 1.1221); S355J2G3N (DIN1.0570); CK10 (DIN1.1121); CK15 (DIN1.1141); CK35(DIN1.1181); 15Mn3(DIN1.0467); 20Mn4(DIN1.0469); etc. Can be produced according to defferent standrds.