The RP-5070 Universal Air Filter is constructed from an oiled cotton filter media. It comes with a vented K&N embossed carbon fiber top and carbon fiber base for strength and durability. The carbon fiber element adds to the light-weight design and gives this filter a smooth glass like finish. The RP-5070 is a clamp-on filter that has an inside flange diameter of 3 7/8 inches and a flange length of 15/16 inches. The base is 12 inches by 6 inches and the filter height is 6 inches.