?NOTICE?- Treadmill (Running Belt) Walking Belt Compatible with NordicTrack X9I Incline Trainer,Part Number 351356.X9I Incline Trainer treadmill has multiple specifications of belts, please carefully check the model number ?MATERIAL QUALITY?- High quality PVC material, with a wear rate 20% lower than traditional materials. The texture is softer than other manufacturers' running belts, which can achieve better operation and reduce the failure rate of Treadmill due to excessive load. ?PRE LUBRICATION?- Treadmill (Running Belt) Walking Belt Compatible with NordicTrack X9I Incline Traine has been pre lubricated. If it is found that the lubrication between your running belt and the roller plate is not enough during installation, you can add a small amount of additional lubricating oil attached to it. Remember not to add too much to prevent the belt from slipping! ?MAINTENANCE OF RUNNING BELTS?-It is recommended to lubricate the running belt at least once a year to reduce the friction and stress of other parts of the Treadmill. ?AFTER-SALES GUARANTEE?- When the Treadmill works normally, our Treadmill belt provides a one-year warranty. If you have any dissatisfaction or are not sure whether this product is suitable for your device, please contact us instantly by email, and I will find the most satisfactory solution for you!