The Metro qwikTRAK LBTM21K4 High-Density Double-Deep Mobile Storage is a heavy-duty, space-saving system that features eight 74" posts, V-groove casters plus a 21" center channel caster assembly for smooth mobility, and donut bumpers and tie bar brackets. The durable Metroseal Gray epoxy-coated finish with Microban® antimicrobial protection resists corrosion and helps maintain sanitary conditions, making it ideal for warehouses, healthcare, and foodservice environments that require compact, reliable dry storage.