The 18 x 42 racks are discreet, yet very durable! Use them in your pantry to keep boxed goods organized and elevated. Organization comes easy with our strong and sturdy wire shelving. Holds up to 800 lbs per shelf, evenly distributed Shelves can be adjusted to any desired height in 1" increments along posts Made for indoor use, dry storage only To securely set and easily release shelves, tap their corners with arubber mallet. View ourWire Shelving Size Guideto see actual outer and inner dimensions.