Where used:

• Parts by Brand StairMaster Steppers 4400CL 13xxx
• Parts by Brand StairMaster Steppers 4600PT 17xxx
• Parts by Brand StairMaster Steppers 4400PT 12xxx
• Parts by Brand StairMaster Steppers 4200PT 15xxx
• Parts by Brand StairMaster Steppers 4600CL 18xxx