Copper Washer Flat Sealing Gasket Ring Spacer for Car 10 x 20 x 1.5mm 10pcs

Flat washers made of copper,have a tighter seal and high heat resistance than steel and rubber washers. 10 x Copper Washers. Flat washers are used to support and spread the load across the baring area of the bolt and nut to prevent pull through.