NiteRider Double Tail Light Seat Post Mount Description: The NiteRider Double Tail Light Seat Post Mount allows for the installation of 2 NiteRider tail lights. It attaches securely with a clamp mount and rubber shims for a perfect fit. Fits seat posts with a 22mm-34.9mm diameter. It features a quick-release tab on each mounting point that allows you to remove just your tail light, leaving the whole mount installed on the seat post; ideal for when you leave your bike unattended or when it's time for a recharge. Features: Dual tail light mount for Niterider cycling tail lights Seatpost-mounted design attaches to various diameters between 22mm and 34.9mm Center oriented reflective strip increases visibility Pair select lighting configurations for use with the wireless NiteLink system for tail light control System Compatbility: Sentinel Omega 330 Solas Sabre CherryBomb TL 5.0 SL Vmax+ 150