Link Motorcycle Fork Seal SET 46x58x9.5/11mm Dimensions: (mm) 46 x 58 x 9.5/11 Link Motorcycle Fork Seals are made from NK825 which is a special rubber compound developed for reciprocating applications with better friction reducing capabilities. Considering the physical properties of NK825, it has a high tensile strength performance so it also means it is strong with a better sealing function.