Arlington 506, 2″, Die-Cast Zinc, Male/Hex Head, Rigid Conduit Chase Nipple, 1pc. Arlington 510, 4 “, Die-Cast, Male/Hex Head, Rigid Conduit Chase Nipple, 1pc. Arlington LT250, 2-1/2”, Die-Cast, Straight, Liquid Tight Conduit Connector, 1pc.