Martin Yale P7200 Premier Rapid Fold Automatic Desktop Letter/Paper Folder, Automatically Feeds and Folds 8 1/2" x 11" Paper and a Stack of Documents, Includes Stacking Tray Creates letter and half folds. Paper Weight Range : 60 gsm to 90 gsm 16 bond to 24 bond. Electrical : 115/230 Volts Operates at a speed of up to 4,000 sheets/hour Use with 8 1/2 x 11 Inches, 16-28 lb. bond paper Feed tray holds 1/2 Inch stack of paper