Improve workflow management and accommodate multiple users by upgrading your printer to automatic stapling and sheet stacking. Monitor your printer less frequently with convenient automatic job stapling and sorting in the additional output bin. Speed up productivity and save time by streamlining workflow processes. Staple up to 15 pages per document and get job collation and sorting. This large sheet tray expands your printer's output capacity and accommodate multiple users' jobs. Save time finding your print job with jobs sorted into neat stacks. Accessory Type: Stapler/Stacker; Dimensions: 26.9 x 26.3 x 43; For Use With: HP Color LaserJet Enterprise flow M880z MFP, M880z+ MFP; Color LaserJet Enterprise M855dn, M855x+, M855xh; Sheet Capacity: 500.