Rev-A-Shelf 18in 3 Shelf Full Round 31in Post White For upper corner cabinets with a 45 angled corner Includes:(3)shelves, (1)31" to 38" zinc telescoping post,(1)pr top & bottom pivots & screws Shelves rotate independently on an adjustable post collar and bright zinc post Twist-N-Lock feature on post for quick installation Tested to exceed BHMA Class-1 Specifications