Artoflifer Kids Indoor and Outdoor Balance Beam Balance Blocks Gym Toys for Kids Weatherproof. Made of PE plastic, can withstand up to 400 lbs, no deformation, environmentally friendly, non-toxic. 8 curvy sections tightly connected via hook in-between, easy to assemble, detachable, solid connection, no wiggle or moving, stackable, storage bag included. Beam blocks create 2 main obstacle courses: the circle course with a diameter of 52 inches and the curvy course with length up to 160 inches. Each block has 4 rubber footholds on the bottom to prevent slipping.