Whether you are tired of people ending up on the grass or if you want to gently suggest where parking spaces are without using painted lines, the Standard Style Recycled Plastic Parking Blocks by Jayhawk Plastics are the perfect solution. They are crafted from 100 percent post-consumer waste so you do not have to worry about raising your carbon footprint to buy them. They are as durable as they are thoughtful too, and will not be adversely affected by snowplows, bad drivers, sand, or salt. Choose from black, green, or yellow, unless you are placing a quantity order, then custom colors are available. These blocks can be left to stay in placed with the help of gravity or you can use spikes or rebar and the pre-drilled holes to secure them where you want them.