Mishimoto MMOFC-HN-RD Honda Oil Filler Cap, Red Billet CNC-machined aluminum for optimal fit and finish Material: 6061 Aluminum / Overall Height: 1.1 / Overall OD: 2.28 / Thread Pitch: M32 x 3.5 Included O-ring ensures a perfect seal Fits most Honda engines Mishimoto Lifetime Warranty