Due to the extensive years of research and development SKF products are the most technologically advanced and this is the standard that has been set for industry. Each part produced by SKF compliments the next. Stand-alone performance is superior but when several products are brought together the benefits are second to none. As the products are all designed to increase performance of the motorcycle, made from the most robust materials and are created with greater protection to make service intervals longer due to state of the art engineering and manufacturing.SKF advantages:-Customized design and material.-Increased sealing efficiency with reduced friction and very low power loss.-Spacer included for an ideal seal running surface and optimum seal performance.-Superior contamination protection for longer wheel bearing life.-Resistance to high pressure water wash with patented integrated rotating plastic shield.-Longer service intervals.-Overall higher reliability for continued high performance of the motorcycle.All SKF Wheel Seals Kit include 2 seals, plus 2 special spacers to service one wheel (either Front or Rear ). On the blister card PN will be reported and a short application of the product. To service bike, customer will have to purchase front and rear kits. The Letter F or R in the part no. defines whether the seal kit is for the Front, or Rear wheel. e.g. w-kit-F008-ktm-hus (Front) w-kit-R006-ktm-hus (Rear)