MATERIAL: It is made of high-quality rubber. The hook is made of premium plastic. It is strong, weather-resistant, durable, and corrosion-resistant. Bungee Cord with Hook Function: The multifunctional bungee cords keep the tent stable. 25 cm elastic band with hook extends to 50 cm. And the tarp tensioner has a plastic hook that holds it securely in place. Bungee Cord with Hook Used: Our bungee cords with hooks are suitable for tarpaulins, camping, boat shoes, tents, gardens, ramps, caravans, and commercial applications. Bungee Cord with Hook Holder: The bungee cord is easily threaded through the bungee cord and holder and then locked onto the hooks. You can also wrap some small rubber bands to increase the length. Note: All data is measured manually, please allow 1-3 cm error. Due to differences in light and display, there may be some color differences, please refer to the actual item received.