1M/2M/5M Car Door Protector U Type Universal Car Door Edge Guards Strip Rubber Moulding Sealing Scratch Protector Strip for Car. Installation process: Measure your door length, cut the Door Guard to the length, slip the Door Guard into your door, and repeat the process around each door. To install, place the trim under the sun for about 3-5 minutes, gently place the door edge guard on the door, measure the length of the door edge, and cut the door guard to the length. Package includes 1 x protective strips for the car door.