Shimano Nexus Oil Dipping Set Internal gear hubs require specific maintenance - Shimano's Internal hub maintenance oil simplifies this task and makes sure that you're using the right stuff. Key Features To use this genuine Shimano oil dipping kit simply dip the internal unit in the special oil for 90 seconds, then let the surplus oil drip from the unit and reassemble it into the wheel As every part is lubricated continuously, a higher durability of the internal mechanism is the result