Protect your valuable shelving units with the Metro 21X48X54C Vinyl-Coated Nylon Cover. This durable cover is designed to fit 21" x 48" x 54" shelving units, providing a barrier against dust, airborne contaminants, and pilferage. Ideal for laboratories, warehouses, and other environments where cleanliness and security are essential. Orders over $7,000 may qualify for free shipping. Contact us for details.