"Pipp" brand Commercial heavy duty mobile rack system with adjustable metal shelving. There are 10- double rivet style racks that measure 36"x36"x108" and have a weight capacity of 3,000 lbs each. All racks come with 4- metal shelves and 1- wire shelf for the top. They connect together in pairs and slide on a 3- track carriage system that mounts to the floor. The total length of the sliding track system is 19'. It comes has anti-tip protection and manual brakes. This package also comes with extra shelf supports to add additional shelving if needed.