High-quality fork oil seals in OEM quality, which differ from the standard oil seals made of NBR (nitrile rubber) due to their exceptional and unique XNBR material (carboxyl elastomer). This compound offers excellent abrasion and temperature resistance, as well as resistance to the oils and additives used in modern motorcycle and scooter forks. Each delivery includes a sachet of "Arisil" special grease to extend the durability of the various components. Dimensions (mm): Inner diameter x Outer diameter x Installation height / Total height Article type Version Fork oil seals Outer diameter 39 mm Features Set Total height 10.5 mm Main color black Inner diameter 27.0 mm