Check the listing for details. Sole AF63 (563810) (2011) Treadmill Walking Belt. Condition: New. Listed at 109.99 USD. Serial: 563810 (2011) Part Name: Sole AF63 Treadmill Walking Belt Sole AF63 Treadmill Running Belt Sole AF63 Treadbelt Condition: NEW 1-ply Walking Belt Ready to Install - Pre-Lubricated LIFETIME WARRANTY (check details) FREE SHIPPING Our Belts are Tested & Fabricated in the USA "Need a custom size made belt? ...we can help, contact us for more information." IMPORTANT: Search by model number. Make sure all information on unit matches listing. Many of our customers often ask us what is the difference between the following names: Treadmill Walking Belt, Treadmill Running Belt, Treadbelt, Treadmill Belt...and the answer is none. Treadmill Belts are often refer to as any of the names above, but the truth is that all belts can be used either for walking or running.- Walking Belts LLC