High performance Sram Pitstop Rock Shox Suspension Oil is all you should put in your Rock Shox fork. This custom racing formula is exactly what the pros use. Five weight oil is typically used in the damper of most Rock Shox forks. Please consult your fork owners manual to determine the proper weight oil for your application. 5-WT oil 120ml Synthetic blend Anti-stiction Anti-wear addidtives Anti-foam additives Consistent damping