Style Shelf: Corner cut out can be staged back left, back right, or front left, front right) Great to allow trellis or moss Pole plants Air Ventilated Shelf for : Milsbo Wide Cabinet (Cabinet not included) Type: Ventilated with ovals and circles Thickness: 3/8'' Sold Individually. Choose 2 for Set Made and designed to allow max air flow without compromising the structural integrity. No other materials or items would be needed other than what ikea provides. Can use our L Brackets for added shelvi