The Cambro EXHDPK1870480 is a Camshelving® XTRA High Density Post Kit designed for mobile units. This kit includes two high-density casters and donut bumpers for enhanced mobility, along with two sturdy posts and a complete set of post connectors for secure assembly. Measuring 18"W x 70"H, it features a speckled gray finish that complements any environment. This product is NSF certified, ensuring it meets strict public health standards. Please note that this kit is part of a new product line and is not compatible with original Elements Series products.