1. The total length of the 12 expansion loops, 6mm elastic band and screw hooks, rubber tensioner extension hooks is 18cm - including hooks. 2.Material: PP Latex and Rubber, 3.2mm Steel Plastic Coated Spiral Hook, Elastic Band Diameter 6mm, Color: Black 3. Due to the high quality, the expansion hook is stable, durable and weather resistant 4. The extension ring is perfect for fast and easy fixing of advertising banners, tarpaulins, tents, posters, or for gazebos, trampolines, trucks, trailers or sun sails 5. Expansion hook, tent supplies, replacement rubber, tent tensioner, tent hook, rubber ring, rubber ring with screw hook. The hook is firmly connected with the elastic band and is not easy to separate.