2). Material : Carbon steel , Spring Steel , Stainless Steel 304/316 can be choosen.

3).Surface treatment : Zinc (yellow or white) plated , chrome , nickle etc ,you can choose 

4) .Remarks:

1.Split Pin commonly used material with a Q215, Q235, copper alloy H63, 1, 0 Cr17Ni7 Cr18Ni9Ti, etc.

2.If material is steel, usually don't  surface treatment, or after galvanization passivation or phosphorus treatment;

3.If material is copper or stainless steel, will processing.

4.The samples free.