Perfect Stop Black Calipers by UCX have the unique Armor-Plate coating that provides robust corrosion resistance with an attractive black finish. The caliper is coated both inside and out so corrosion protection is provided in all areas of the caliper including critical areas such as the piston bore and slides. They are completely assembled with all brackets and hardware including the banjo bolt which is hand turned into the caliper to insure the integrity of the inlet threads.