Easy to install, suitable for bicycle's stem. This stem extension mount is made of Aluminum alloy, solid, firm and durable to use. It is a extension mount holder for iGPS computer and sports camera and other accessories. Colour:black Material:Aluminum alloy Package Contents: 1 x computer mount bracket kit(with Camera ) Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.