These blocks provide a wider end (up to 11") for athletes as they train on the balance beam. Durable webbing and ratchet straps hold both halves together and secure it to the beam, keeping the blocks secure during use. Made of 3 lb EPS with a MDF wood top and bottom (the same material as table tennis tables) for enhanced strength and durability. 36"L x 4"W; 12 lb.