2M/5M/10M Car Door Protector U Type Universal Car Door Edge Guards Strip Rubber Moulding Sealing Scratch Protector Strip for CarInstallation process:(1) - Measure your door length (Measure Twice Cut Once)(2) - Cut the Door Guard to the length you just measured(3) - Slip the Door Guard into your door(4) - Repeat the process around each door.How to install:1. Place the trim under the sun for about 3-5 minutes (This step make the trim more flexible)2. Gently place the door edge guard on the door so as to line it up with the contour of the door3. Measure the length of the door edge, and cut the door guard to the length you just measured4. Slip the door guard into your door5. Make sure the position of the door edge guard is correct.The guard will slowly bend into the proper position as you apply taps. Once in place, do not remove, reposition, or reinstall the door edge guardHow to choose the size:Ordinary Car:5 meters for 4 doors vertical edge8 meters for 4 doors vertical edge+bottom horizontal side13 meters for 4 doors vertical edge+bottom horizontal side+bottom side of the trunkOff-road Vehicle SUV:5 meters for 4 doors;8 meters for 4 doors+bottom side of the trunk10 meters for 4 doors+bottom side of the trunk+the hoodPackage List:1 x protective strips for the car door