EMT Couplings, ETP Compression, Series: 6000US, Material: Steel/zinc plated, Trade size: 2-1/2", Body Length: 5.50", Maximum Diameter: 4.13", UL Standard: 514B, UL Listed: (1/2-3) E14815, CSA Standard: C22.2 No. 18.3, cUL Listed: (1/2-3) E14815, NEMA: FB-