... , 2.Shim Rings, Plain Washers 3.Washers for Bolts, etc washer & gasketCurved Spring Washers1, Material:NBR,CR,HNBR,ACM,SBR,EPDM ... box or according to your requirements.6,Application:electronic field, industrial machine& equipment, house-hold appliance, tele-communication, automobile, medical equipment ...