The refurbished HP LaserJet 4000, 4050 optional 500 Sheet Tray c4124a. This HP tray assembly delivers optimal paper-feed output for all your printing needs. You'll find that this tray allows the 4000, 4050 series LaserJet to expand its input capacity by 500 sheets. An increase of paper capacity means you'll refill your paper tray less often, all the while enjoying HP's high performance and integrity. The paper tray allows multiple media types to be used, paper sizes A4 through Legal (8.3" X 11" to 8.5" X 14"). This tray is user-installable.