These fusers are compatible with the below part numbers and machines

Xerox

Part numbers:  26N00291, 126N00326, 126N00342, 624S00037

Machines:    Phaser 3635MFP/S, WorkCentre 3550

Dell

Part numbers:KW449, 591-BBBV

Machines:  2335dn Multifunction Laser Printer / 2355dn Multifunction Laser Printe

Samsung

Part numbers:JC91-00925A, JC91-00925D, JC96-05063A, JC91-00929A, JC91-00947A, JC91-00947B, JC96-04534A

Machines:  ML-3471ND, SCX-5835FN, SCX-5935FN