The HART 4 Tier 53" H x 36" W x 18" D ventilated plastic storage shelving unit is for all your storage and organizational needs. This lightweight, yet durable plastic storage shelf unit gives you ample space where and when you need it. Not only is it easy enough to assemble in minutes but only requires 1 person. This 4 shelf unit is made of recycled materials with minimal packaging to protect our environment. Each shelf will hold up to 150 lbs when evenly distributed across the shelf. The ventilated shelves help resist mold and mildew, while not rusting unlike metal or steel. Perfect to use indoors or outdoors. Great for the garage, closet, shed, pantry, basement, and more.