Add-on shelving extends the length of your current wire storage shelf, requiring less posts and allowing more unique storage configurations. Design provides extra storage while also saving space 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.