ST Series straight liquid tight connector with plain throat, size: 2 1/2 in, connection: threaded x compression, material: Malleable iron, finish: Chromate, epoxy powder coat/zinc electroplated, dimensions: 3.38 in Length x 3.94 in height, standard: Class I, division 2, UL standard 514B, UL listed e 11853, CSA standard C22.2 no. 18.3, CSA certified 065178, NEMA FB 1