Spring steel: The spring steel allows the frame to pop out and collapses while retaining its' shape and structure. Cat tunnel: Get a collapsible five way pet tunnel. Size: 28cm x 25cmx 25cm. Strong materials: Made of tear resistant polyester to withstand scratches and wear and tear. Tunnel includes: Cute toy ball included - add other toys in the tunnel for your cat to play with. Five way tunnel: Includes five tunnels for your little kitty to run through and play hide and seek with. Collapsible Five-Way Pet Tunnel | Living Social | Living Social