HP LaserJet 4L 4ML Paper Tray Cassette $15.00 For all paper sizes. HP LaserJet 4L 4ML Paper Tray Cassette quantity Add to cart Add to Quote Continue Shopping Category: Laser Description Genuine HP paper tray cassette for LaserJet 4L or 4ML printer. Part number RB1-3140. Paper tray is in excellent condition.