SKF WP 48mm AER Fork Kit GK-WP34AERThe InnTeck Low Friction Cartridge Seal kit replaces the stock cartridge rod seals and air divider piston seals in the new Showa SFF TAC Fork The new Showa SFF TAC Fork features many internal seals and 5 of the 6 seals are subject to very high pressure High pressure on a seal results in a tighter seal and therefore much more seal drag (friction) when compared to other production forks InnTeck utilized world class Italian bearing and seal manufacturer