Turface Moundmaster Blocks Red will help build a perfect foundation around home plate, in the batter's and catcher's boxes. These high-quality clay blocks are made from 100% pure virgin clay that promise to deliver long-lasting performance. They are perfectly sized for building mound and plates correctly. It has pliable construction so it's easier to mold into the right form. Each package contains 8 block sets in water tight bags to make sure it will retain proper moisture.