Rev-A-Shelf''s Lazy Daisy polymer susans feature a unique patented snap pin that make installation a breeze. Most susans are made from durable polypropylene plastic and plastic hub is molded right into the tray. Available in single, 2-shelf and 3-shelf models offered in both White and Almond colors.-Included: (2) White Full-Circle Polymer shelves with bottom mount hardware-Independently rotating molded Polymer hardware-Shelves are not adjustable and are fixed-12-3/4" clearance from the bottom of the top shelf and the surface of the bottom shelf-Designed for Corner Base Cabinets-Construction: Injection molded polymer plastic designed for durability-Shelf Weight Rating: 20 lbs. per sqft-Simple (4) screw installation