The 1872S Wire Shelf is strong due to its welded construction and added wire trussing. Air circulation and light penetration is increased thanks to wire mesh construction. Its design makes it easier to pack and unpack the shelf and it is connected to wire shelving posts via a split conical sleeve adaptor. National Sanitation Foundation approved. Genuine Quantum modular wire systems offer a unique combination of shelf and post sizes in a variety of finishes to compliment any application. The all welded shelf construction is supported with architectural wire trusses to provide between 600 to 800 lbs capacity per shelf.