Two square feet of storage can be added to your existing wire racks with these convenient add-on kits. Easy to attach, just place two S-Hooks on the end of your existing rack and let them support the new shelves. Design provides additional storage without using too much floor space Attaches to existing chrome wire shelving units to extend the length of shelves Holds up to 800 lbs per shelf, evenly distributed Shelves adjust every 1" along posts Made for indoor use, dry storage only S-Hook 2-Packrequired per extra shelf To securely set or quickly remove shelves, tap their corners with arubber mallet. View ourWire Shelving Size Guideto see actual outer and inner dimensions. Availability:Ships next business day