Rockshox Bo XXer WC Charger Damper Kit The Rockshox Bo XXer WC Charger Damper Kit has everything you might need to keep your World Cup fork running as smoothly as the day it was new, and just as eager for a new round of work. All the seals ring elements for one service session are included in this kit. Rockshox Boxxer WC Charger Damper Kit Specifications: Basic service kits include dust seals, foam rings, oil seals, air and damper o-rings needed for basic service Kits are for servicing one fork | Rockshox | Boxxer Wc Charger Damper Kit Basic Service Kit, Team Charger Damper (2015+)