For aero seat pillars. An adapter for attaching a license plate used in races to the seat post. Installation is quick and easy with special bolts that automatically drill holes in the plate. Rubber O-ring fits securely on the seat post. Inner protective rubber prevents slipping and seatpost damage. Bolt spacing (C-C): 21mm Reference weight: 10g

●For aero seat pillars. ●Adapter for attaching the license plate used in races to the seat post. ●Quick and easy installation using special bolts that automatically drill holes in the plate. ●Rubber O-ring fits securely on the seat post. ●Inner protective rubber prevents slipping and damage to the seat post. ●Bolt spacing (C-C) . br>Package size: ‎13.8 x 12 x 2 cm; 18.14 g