Vertiflex InstaCart Sidekick File Cart - 4 Casters - 2.75 Caster Size - Steel - x 15.5 Width x 13.8 Depth x 26.3 Height - Black - 1 Each InstaCart file cart assembles in seconds and requires no tools. Open top area accommodates letter-size hanging file folders. Bottom shelf is open for stacking paper and supplies. 15-1/2 deep sturdy file cart is made of durable steel and wire construction. Use the pull handle on each end and four swivel casters to move the cart easily from location to location. Two of the 2-3/4 diameter casters lock to immobilize the cart for loading and unloading.