STRONG HOLD Mobile Ventilated cabinets are ideal anywhere security and fresh air ventilation are necessary. Used to store many different items, mobile cabinet features adjustable shelves to accommodate various sized tools and supplies. Ventilated doors and back provide cooling air flow as well as quick visual inspection of stored items. Two fixed, two swivel casters ease movement of fully loaded cabinet between work areas. Medium gray, light gray, and blue cabinets are custom-made and not returnable.