Find plumb, level and 45¡ quickly and easily with Johnson's 9" Structo-Cast(TM) torpedo level. This level is durable and convenient, with Johnson's unique high-impact and non-corrosive Structo-Cast(TM) frame that was designed to withstand even the toughest jobsite abuse. It also features a top-read window for convenient, easy viewing, while the V-groove frame fits on pipe and conduit.