OEM quality engine valve keeper valve cotter 1-Material: Steel 45#,40Cr etc. 2-Any spec. as per customer's sample or drawings. OEM quality engine valve keeper valve cotter 1- Material: Steel 45#,40Cr etc.2- Use for Volksvagen,Audi,Volvo, Mercedens benz,Toyota,Deutz,Komatsu etc.3-Equipment:Japanese punching machines, Tokyo precision profilometer, Tokyo precision coordinate measuring instrumen,etc. ...