Reinforce your trampoline enclosure system with the Machrus Upper Bounce 4 Straight Trampoline Enclosure Poles. These poles are made of weather-resistant steel for durability and are compatible with trampoline legs measuring 1.5 inches in diameter. The U-bolts are easy to install and securely attach the poles to the frame, and the pole caps help keep your enclosure netting in place. Foam sleeves add padding to the poles to help protect against injury if you accidentally collide with the poles. Machrus Upper Bounce 4 Straight Trampoline Enclosure Poles Blue - Trampolines at Academy Sports