Parking Blocks are designed using HDPE (High Density Polyethylene) and are light weight, yet heavy duty. They are flexible enough to fit various parking lot contours, and do not need to be repainted on a seasonal basis. Four colors are available: Yellow, Blue, Gray, and Black with Yellow Strips. All parking blocks include anchor kits (3 anchor spikes). Dimensions are 8 inches wide by 4 inches high by 72 inches long.