Made of aluminum alloy material, the mount holder is durable and lightweight. Mount camera securely on the helmet for to record the scenery while riding. No tools required, it is easy to install. The aluminum fixed mount is an exceptional choice if you are looking for an extraordinarily durable mount with a fixed base. It is a professional and practical helmet camera mount, with this aluminum fixed mount, you can mount your camera on and adjust position for optimal perspective. With easy to install and use, it is really a helmet camera mount kit for choice. size: 40 x 30 x 54mm Material: aluminum alloy colour: black Package Contents: 1 x Fixed Mount Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real . The measurement allowed error is +/- 1-3cm.