Anti-wrap design: the flag pole rings are deigned with a rotating anti-wrap ring, which allows flags fly freely in the direction of the wind, and preventing the flag from wrapping around the flagpole Material and size: flag pole rings are made of aluminum alloy, durable and no rust to use with a long time; The inner diameter of ring is 1 inch, so it's fit for 1 inch diameter flagpole, measure the diameter of your flagpole carefully Easy to install: you just need to install the 4 aluminum alloy mounting rings to the flagpole, then attach the top/ bottom grommets of the flag to the clip hook located on the rings, and then adjust position on the flag pole Crafted equipment: there are 4 pieces clip hooks hanging the clip between the flagpole ring hole and the flag grommet, which help you to connect the flagpole and flag, let you apply more Size:the inner diameter is 1 inch/ 2.54 cm, the outside diameter is 1.46 inches/ 3.71 cm and the height is 1.18 inches/ 2.99 cm Colour:black Material:Aluminum alloy Package Contents: 4 x Anti-wrap flag pole 4 x Clip hooks Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real . The measurement allowed is +/- 1-3cm.