Empire, 5-1/4", Poly-Cast, Post Level, Ideal For Leveling Posts On Decks, Fences & Support Poles, Lightweight & Durable Poly-Cast Construction, Three Vials To Read Plumb & Level, Durable Poly-Cast Construction, Durable Vials Read Plumb & Level, Establish Plumb Or Level On Decks, Fences & Support Poles, Includes High Strength Rubber Strap For Attaching To Work Surface, Ideal For Leveling Post & Pipe In Level Or Plumb.