Concrete Donuts for a Rotary Head Full, Large Full, Green
Concrete Donut Sprinkler Head Protector for Underground Sprinkler Heads and Sprinkler Systems. Displaces the Weight of a Vehicles Tire Aiding in the Prevention of Sprinkler Heads and Pipes. Made in the USA! (This is Not Cheap Plastic and will Not Float Away). Patent Number 8844839