ProX Fork Seal Set CR250/F250R/F450R 97-09 + RM-Z450 05-12 ProX Front Fork, Oil Seal and Dust Seal Features: Manufactured by the leading OEM factories in Japan such as NOK. High quality base materials made to OEM specifications and tolerances for guaranteed quality and superior durability. Available separately or in sets to be a simple and cost efficient OEM replacement. Full range of oil seals and dust seals for MX and Dirt Bike available from ready stock.