... (m) Shaft ≤2.0 ≤10 Block ≤3.5 / Ring ≤4.9 ≤4.0 Cylinder ≤1.5 ≤4.0 5. Certification: ISO9001 ... /23/EC ,GL 6. Work Shop: 7. Products: 8.Packing: 9. Certification: A105,LF2,F6a,F304,F316,321,F22,F51,F11 ... ,17-4PH,F60,4140,4340,4130,410,310,320 forging bar/forged roller/round bar