Magnetic Break-Free Bases come complete and include everything you need for installation: a rubber padded base cover, stanchion pan, ground inserts and three interchangeable magnetic plates to adjust holding strength. Meets Little League rule 1.06. Includes 3 different plate sizes to adjust the holding strength of the base to the anchor. The durable rubber base cover is made with steel stanchion pan and modular heavy gauge non-collapsible textured white rubber for excellent durability. Dimensions: 15" x 15" x 2 1/4". Sold individually.