ITEM NAME:8x Red Car License Fender Washer Screw Style Anodized Aluminum M6 Steel WZZ.Screw Hex bolt size: M6. Car Anodized Aluminum Fender Washers. Screw is made of stainless steel and fender washers is made of Aluminum. Washer material: Aluminum alloy. Screw material: stainless steel.