The Stem Cap Light Mount is a great way to mount a light, computer, power meter, or GPS unit right in the center of your handlebar and stem. The Stem Cap Light Mount is machined from 6061 aluminum and is anodized in your choice of black or silver. Designed to replace the top cap of a threadless stem, this light mount provides a perch for accessories that would normally mount on the handlebars. This is especially useful if your bars are already crowded by grips, brake levers and shifters. Like the stem cap it replaces, the Stem Cap Light Mount comes with a screw for headset adjustment. It is available for 1 inch and 1-1/8 inch systems. Specification: Material: 6061 Aluminum Weight: 24g Outside diameter: 26.0mm Available in black or silver.