"Designed specifically for handicap parking spaces, the blue and white parking curb is highly visible even at night, and immediately identifies handicap parking spots to passing vehicles. These 4"" high rubber curbs won't damage cars with lower front ends. These parking stops are safer and more durable than concrete and plastic curbs, and won't crack, chip, or fade. The Park-It comes with pre-drilled 3/4"" holes for permanent installation (installation hardware not included). Featuring a flexible design, these curbs easily conform to uneven surfaces."