Check the listing for details. Sportsmith Prelubed Treadmill Belt for certain ProForm 615 Model#s. Color: Black, Condition: New. Listed at 99.00 USD. This prelubed Sportsmith walking belt fits certain ProForm 615* treadmill model#s. If it's minimal maintenance you want, this PVC belt with impregnated lubrication requires less attention to make things run smoothly. All Sportsmith belts feature components that make the best when it comes to quality and performance. A top feature of Sportsmith belts is the non-directional, finger splice seam. This means you can install the belt in either direction. Sportsmith running belt fits ProForm 615* treadmill model#s PFTL680110 and PFTL680111 User facing material: PVC User facing surface: Black Diamond Impregnated lubrication 1 ply *Some models with the same name use different parts. This is why you should always match your model number or serial#.