Fits dryer models that have the lint screen in the top right. 
 
Dryer Maintenance Kit for a Whirlpool 29" Dryer; part number 4392065.

This kit includes:

Drum Rollers number 349241 (2)
Idler pulley number 691366
Drive Belt (341241)
4 Tri Rings 
2 clips
Instruction sheet

Replacement for numbers AP3131942 and PS373087.