Engineered from high-quality rubber for superior resistance to fuel, oil, and heat, the Dorman Fuel Injector O-ring is designed to provide a secure air-tight seal. This complete kit, containing multiple rings in various sizes, makes installation fast and Product Features:Designed to naturally combat brittleness, cracking, and heat agingO-rings are also available separatelyManufactured to strict engineering quality standardsThis part has undergone vehicle try-on testing to meet product standards