Sprinkler Head Guard Protector Donut Concrete Mold 5 inch Hole 7238B THIS IS A MOLD TO MAKE YOUR OWN SPRINKLER GUARDS Sprinkler guard concrete mold 7238B Polyethylene Plastic Mold Measures 8 3/4" across by 1 3/4" thick and 5 inch hole in center Each order comes with easy to use basic instructions