HP Hewlett Packard Q2442B Sheet Stacker for HP LaserJet 4250 Series Printers, Sheet stacker Product Type, 500 sheets Total Media Capacity, For use with HP LaserJet 4200, HP LaserJet 4200dtn, HP LaserJet 4200dtns, HP LaserJet 4200dtnsl, HP LaserJet 4200L, HP LaserJet 4200Ln, HP LaserJet 4200n, HP LaserJet 4200tn, HP LaserJet 4250, HP LaserJet 4250dtn, HP LaserJet 4250dtnsl, HP LaserJet 4250n, HP LaserJet 4250tn, HP LaserJet 4300, HP LaserJet 4300dtn, HP LaserJet 4300dtns, HP LaserJet 4300dtnsl, HP LaserJet 4300n, HP LaserJet 4300tn, HP LaserJet 4350, HP LaserJet 4350dtn, HP LaserJet 4350dtnsl, HP LaserJet 4350n and HP LaserJet 4350tn.