Rear Washer-Nozzle Hole Cover, 38mm Billet Cap, Weather-Proof, fits holes 14mm to 30mm - multiple finishes.The kit includes an outside and inside billet-aluminum bracket available in a Black Finish using an included gasket made of silicone rubber (unlike other solutions out there that use regular hardware-store rubber washer prone to deterioration / dry-rot).Fasteners are Stainless Steel (SU304) and are corrosion-resistant and come in multiple lengths to accommodate the widest possible range of vehicle models.The exterior/outside "cap" portion is 38mm wide and ~1.6mm tall for a low-profile and flush finish.