Simplify your space with our 21"d x 30"w 4-tier chrome wire shelving, a strong solution that's suitable for many business and home storage requirements. Open design for optimal air circulation, accessibility, and visibility Sturdy chrome-plated steel construction 800 lb capacity shelves can be adjusted easily in 1" increments along posts Made for indoor use, dry storage only To securely set or quickly remove shelves, tap their corners with arubber mallet. View ourWire Shelving Size Guideto see actual outer and inner dimensions.