Dimensions: 43 x 53.4 x 6/13 TYPE- Y-1 (DUST SEAL) ARIETE* Fork Seals are manufactured using XNBR* Rubber compound and Stainless Steel metal inserts with Steel tension springs. XNBR* Carboxylated nitrile rubber is an improved version of NBR* type rubber, XNBR* combines the technical properties of nitrile rubber NBR* but with an increased strength, higher abrasion resistance and a tolerance to chemical additives which are used in fork oils. All ARIETE* fork seal lips are Fine Ground Finished, which offers complete control of varying internal pressures during extension and compression of the Fork. Ariete Fork Seal Set - Comprises of 2 x Premiun M/C Fork Seals and 1 x Sachet with special Arisil grease which helps to increase the life of the seal.