Lufkin Brass Plumb Bob, 20oz, 6 3/4" Long: * Nonferrous, nonsparking brass weight helps you get a plumb reading in any environment * Tapered tip allows you to more clearly perceive flat, horizontal-surface contact * Large-diameter eyelet simplifies cord attachment (cord not included) * Bob Weight: 20 oz * Material(s): Brass * Shape: Cylindrical