CONFIDENCE - While your for Garmin Varia or similar radar system increases your awareness and personal security when you're out on the road, our for Garmin Varia Mount builds on the confidence providing a strong and secure mount for Garmin Varia RTL510, for Garmin Varia RTL515, or any other rear-facing device utilizing the for Garmin quarter-turn system. NOTE: Not compatible with the for Garmin Varia RCT715 ADAPTABLE - Utilizing the ATOP dial system, our for Garmin Varia mount quickly and easily adapts with the turn of a dial to fit a variety of seatpost diameters and geometries: 27.2mm, 30.9mm, 31.6mm, D cross-section, or aero cross-section. QUICK CHANGE - The ATOP dial system quickly and easily installs and secures on any bike in your stable eliminating the need for multiple varia mounts or bothering with the slower bolt-on Varia mounts. SAFE - The ATOP lacing system and rubber adapter pad provides a soft interface that won't scratch or wear your carbon or aluminum seatpost. SECURE - Ride confident knowing your for Garmin Varia mount is securely dialed-in with the strong and dependable ATOP lacing system without the fear of a failing single rubber band. Color:Black Material:Plastic Package Contents: 1 * 03 Tail Light Bracket