all kinds of material washers: product Grade A washers(DIN125A), Single Coil Lock Washers(W/Square End), Toothed Lock Serrated Internally Washers(DIN6798J),Serrated Lock Washers External Gear Type A(DIN6798 A), Waved Spring Washers Type A(DIN137A) ,Waved Spring Washers B(DIN137B), French standard washer. We can make sample for u as customer requirements.