This is a no return sale, as we do not want someone switching them out, so keep this in mind please. as we have a list of them, thank you, (2)  25-1622-7, (15) 26-1613-4, (4) 3DX5373, (1) M-90XD, (1) 2752, (1) 26-1627-4, (1)26-1626-6, (1) 26-16115=0, (1) 26-625-8, (1) 261615-9, (12) 25-1616-9, (1) 26-1625-8, (2) 25-1618-5, (1) 26-1625-8, (2) 26-22DS, Electro Voice 533371-300, Astatic 522468-3, Astatic 62-TY -LQD-1J, Astatic 16L3