This is a Replacement Treadmill Doctor Walking Belt Part Number 423446 Used on the Following Models Listed Below. 

Proform-

PFTL28820.0

PFTL28820-INT.0

PFTL28820-INT.1

PFTL28820C.0

PFTL48721.0

When it comes to replacement walking belts Treadmill Doctor has been a leader in the fitness industry. Our walking belts are made from quality polypropylene materials, 2 ply construction with the backing made of polyester blended material. A warranty for our walking belts is offered depending on your setting you may want to opt for the Lifetime warranty when in a residential setting and the 1-year warranty in a commercial setting.