MORE SAFER: The upgraded 18'' parking aid design increases the height to 1.8 inches, can prevent tires from out-running the parking stopper more effectively, avoid hitting the walls or other parked cars. Securing your car to the ground better and making parking more safer every time BOLD STRIP: The wheel stops are with conspicuity yellow safety stripes to improve the visibility. Parking in dimly lit areas can also be safer. This 18 inch car stopper for garage vehicle was made of environmental protection material was no strong odor unlike other rubber products PEEL & STICK: This garage car stopper does not need to be drilled to install, the product has styrofoam on the back, easy to install, peel and stick, helps save space, specially designed for your indoor garage MORE ROBUST: Updated peel-and-stick foam adhesive design makes the parking aid work more firmly between your car and garage ground, holds your cars in place for more stable placement on even roads and garages.It can help you stop safely every time SINCERE SERVICE: The parking aid each size is 18x3.5x1.25 inches and each weighs 28 ounces. If you have any questions after purchase, please contact us first, we will glad to help you solve the problem. The 2 pack of parking aids are ideal for retail, commercial, business garages