Motor Belt for certain Stairmaster and Quinton Treadmills

• A replacement drive belt for certain Quinton and Stairmaster treadmills.
• This belt fits Quinton and Stairmaster treadmill models:
  • Stairmaster Club Track 510/510+ (S/N Beginning 448 and 458)
  • Stairmaster Club Track 612/612+ (S/N Beginning 456 and 457)
  • Quinton Med Track CR60 (S/N Beginning 380)
•  The belt will have marks of '300'.