The Tuff-Seal WH Series of Watertight Conduit Hub offers an outline with different plotted serrations that give a bigger & tighter surface in addition to a solid watertight seal even with harsh or oversized knoc-out. It is made from stainless steel material. This product is planned with 2 simple piece construction. It also offers positive grounding and protective throats that restrict wire abrasion. The device is supplied with 0-Ring to guarantee a watertight seal. This series is typically designed to attach rigid metal conduit (or IMC) to a threadless opening in electrical enclosures. It is also accessible in 1/2" to 4" hub sizes. In addition, this hub is available in grounded style.