Description: . Medium-duty boxes offer 25 percent greater stacking strength than other brands plus the most secure box closure available. Ideal storage for inactive files, works with or without shelving units. FastFold One Step Set-up makes box assembly fast and easy. Maximum security box with string and button closure keeps contents secure, even if box is overturned. Average amount of evenly distributed weight that can be safely stacked on top of box is 500 lb. for letter-size boxes and 550 lb. for legal-size boxes.
