IMPA Code: 610651/610652/610653/610654/610655/610656/610657/610658/610659/610660/610661/610662/610663/610664/610665/610666/610667/610668/610669/610670/610671/610672/610673/610674/610675/610676/610677/610678/610679/610680/610681/610682/610683/610684/610685/610686/610687/610688/610689/610690/610691/610692/610693/610694
Made of selected alloy steel with the opening size stamped on the head.
