2 Post offers a variety of sliding or fixed shelves for 2 Post racks. They are able to withhold weight from 30 lbs (14 kgs) to 900 lbs (408 kgs). Also the shelves are compatible with threaded, square, or round hole racks, while giving an adjustable mounting depth. 2 Post shelves are designed to hold all types of equipment in any size or weight. The 2 Post Rack Shelf works with most standard 19" racks and offers a weighing capacity of 30 lbs.