HP LaserJet Envelope Feeder Automatically print envelopes so you can focus on real business needs. Make envelope printing an easy part of business productivity with this feeder that holds up to 75 envelopes. Add a second feeder for a total capacity of 150 envelopes. Compatible Products: HP LaserJet Enterprise M607n (K0Q14A#B19) HP LaserJet Enterprise M607dn (K0Q15A#B19) HP LaserJet Enterprise M608n (K0Q17A#B19) HP LaserJet Enterprise M608dn (K0Q18A#B19) HP LaserJet Enterprise M608x (K0Q19A#B19) HP LaserJet Enterprise M609dn (K0Q21A#B19) HP LaserJet Enterprise M609x (K0Q22A#B19)