The touge runners engine bay dressup washer kit. Black dressup washersThese are made from 6065 billet aluminium. The bolts are a4 marine grade stainless steel, which have a higher tensile strength and better surface against corrosion making them superior to the other a2 washer bolts you see on the market.The dress up kit includes-10x billet aluminium washers10x a4 grade stainless bolts