Backing Ring For Ctrb K Class (6 1/2" X 9") To Nei Drawing No.Rbsd-7077 Rev B Or L Atest Part No.9 [ Warranty Period: 30 Months After The Date Of Delivery ] [Quantity Tolerance (+/-): 5 %Age , Item Category : Normal , Total Po Value Variation Permitted: Max 8 Lacs ] ]