Martin Yale 7500 Paper Letter Folder Folding MachineDescriptionSpecificationsShipping The Martin Yale 7500 A4 folder is a compact A4 folding machine capable of producing all the standard fold types. Stapled sheets not a problem, the 7500 accepts up to 3 sheets at a pass folded into one. Compact design, the 7500 fits onto the smallest desk when required then easily stowed away when not in use. Paper size: A4 Paper weight: 60 to 135 GSM Speed: Up to 4000 folds per hour Stapled sheets: Hand feed up to 3