Proform 520 ZN Treadmill Motor Drive Belt, Model Number PFTL591120 Part Number 307209

This is the replacement motor drive belt for the Proform 520 ZN treadmill. Model number PFTL591120. Part Number 307209. *Flexonic belts are made to stretch, The belt will appear to be too small. You must walk it on to the pulley, this is by manufacturer design.*