Bonamici Kawasaki Ninja 400 Gas Cap. Keyless for a Quick Release to make Gas Fill Ups Easy especially for Racers and Performance Street Riders. Up to 50% Lighter than OEM gas caps, made from CNC Aluminum T-6061. Anodized in Black. Includes Rubber Seal O-Ring and Stainless Steel Screws (may require use of OEM screws).