The Metro LBTM21S is a high-density track shelving system designed for efficient double deep storage. This mobile unit kit includes eight 74-inch posts for robust support, a V-groove caster for smooth mobility, and a 21-inch center channel caster assembly for enhanced stability. It also comes with donut bumpers, tie bar brackets, and all necessary hardware for easy assembly. Crafted from stainless steel, this system ensures durability and longevity, making it ideal for maximizing storage space in various environments.