This is a Replacement Carriage Roller for Various Nordic Track and Proform Models listed below.

NordicTrack -
NTEVRW10918.0
NTEVRW10918-CH.0
NTEVRW15920.0
NTEVRW59216.0
NTEVRW59715.0
NTEVRW59715.1
NTRW10121.0
NTRW10121.1
NTRW10121.4
NTRW10121-INT.0
NTRW10121-INT.3
NTRW15121.0
NTRW15121-INT.0
NTRW19147.0
NTRW19147.1
NTRW19147.2
NTRW19147.3
NTRW19147.4
NTRW39121-INT.0
NTRW39121C.0
NTRW5914.0
NTRW5914.1
NTRW5914C.0
NTRW59146.0
NTRW59146C.0
NTRW59147.0
NTRW59147.1
NTRW99147.0
NTRW99147.1
NTRW99147.2
NTRW99147.3
NTSY20119.0

Proform - 
PFEVRW41016.0
PFEVRW41019.0
PFEVRW49715.0
PFEVRW49715.1
PFRW23923.0
PFRW23923C.0
PFRW38116.0
PFRW3814.0
PFRW3814.1
PFRW3814.3
PFRW48120.0
PFRW48120.2
PFRW48120-INT.0
PFRW48121.0
PFRW48121.1
PFRW48121-INT.0
PFRW48121-INT.1
PFRW58118.0
PFRW58121.0
PFRW98120.0
PFRW98120.1
PFRW98120-INT.0
PFRW98920.0
PFRW98920-INT.0