Description The Project Flock Multi Seatpost Mount is a set of rubbers and a spare resin mount for securing your biomotion light. This mounting kit is the same that is supplied with your Flock Light. Which makes it great for a second bike, or as a spare part replacement. The different sized rubbers provided account for different seatpost widths & shapes. With the provided options you will be able to fit your Flock Light to any seat post. Mounting the mount to your bike light is a simple twist lock. So moving your light between bikes is just the flick of a wrist. Project Flock Multi Seatpost Mount Features & Specs 3x different black rubber straps included 1x mount for securing the Flock Light Fits a variety of seat post sizes & shapes Wanting to mount your Flock Light to your seat-post rails for a neater look? You will need the Project Flock Saddle Rail Mount.