OneUp Components V3 Dropper Post Rebuild Kit Description: The OneUp Components V3 Dropper Post Rebuild Kit includes the necessary seals, bushings, and other small parts necessary to maintain and/or restore the functionality and performance of a OneUp Components V3 Dropper Seatpost. Regular maintenance on the seatpost will ensure the dropper seatpost will operate at peak performance and last longer. Includes: (1) Mid Cap Assembly (1) Mid Cap Seal (Dust Wiper) (1) Cartridge Spacer (1) Upper Bushing (1) Lower Bushing (4) Brass Guide Pins (2) Polymer Guide Pins