Z-Athletic Gymnastics Attachable Low Beam Multiple Sizes, Colors and Counts Dimensions: 4" high, 4' long, 4 wide at the top, and 8 wide at the bottom Sectional design: Hook and loop connections on end to link together additional beam sections or Z-Athletic mats Link 4 beams together to make it competition length and perform routines without stopping Made of high-density cross-linked polyethylene foam core Covered with high quality synthetic suede