MaterialSturdy enough, the surface is smooth, without burrs and damage. Can be used for a long time. FeaturesIt is suitable for trampoline railings. The special triangular hooks make the safety net belt firmly in place and prevent the pole from slipping off. ApplicationIt is very easy to install and use, the shell rod top cap fits perfectly, and it is very easy to place and place the net in the woods. It is a very practical accessory. Delivery Quantity: 1 set of 6pcs, plastic tube cap for trampoline jumping Package Contents: Only the above package contents, excluding other products. Size: 5.4 height * 3.2 diameter (Reminder: The size is measured manually, there is a slight error) Colour: Black