Schutt Jack Corbett MLB Hollywood Anchored Base is the longest-lasting pro style bases available in the game today. Used by Major League Baseball since 1939. Made from high-quality rubber. Tapered lip digs into the dirt, greatly reducing edge turn up. 1200 lbs. Of tensile strength prevents tears and cuts. Dimensions: 15” x 15” x 3”. Feature 6” stanchions. Recommended for advanced levels of play only. Stand up well in all weather conditions. Set includes all of 3 bases and mushroom plugs.