The Allegheny 40158C is a 4-inch steel long radius belled tee for tank trailer piping applications. Compared to traditional butt-welded fittings, this is a welded-style fitting that allows for easier piping alignment and installation. Constructed from 16-gauge steel with a 6-inch long radius, the 40158C offers durable performance for creating branch connections in tank trailer piping systems requiring steel construction.