Paper Capacity of Staple Mode Upper/Lower Tray: 1,300 Sheets/100 Sets (Letter, Executive) 650 Sheets/50 Sets (11" x 17", Legal, Letter-R, Staple with Different Paper Sizes) Max. Stapling Capacity Letter, Executive: 50 Sheets (17 lb. to 20 lb. Bond) 30 Sheets (20 lb. to 28 lb. Bond) 2 Sheets (28 lb. Bond to 140 lb. Index) 11" x 17", Legal, Letter-R: 30 Sheets (17 lb. to 20 lb. Bond) 20 Sheets (20 lb. to 28 lb. Bond) 2 Sheets (28 lb. Bond to 140 lb.