Features: Brand new and premium quality You can use the item to mount your radar tail light or bike tail light The bike saddle must satisfy the requirement that the center distance of two mounting points is 53-58 mm Note: saddle support only, the Varia Rearview Radar / RTL510 in the pictures is not included Specifications: Item name: Bike saddle support seat-post mount tail light holder Color: Black Compatible with: the bike saddle that has 53-58 mm center distance of two mounting points Suitable for: Garmin Varia Rearview Radar / RTL510 Packing includes: 1 x Saddle support (PC)