Zenith Specialties Zenith Specialties, Inc was established in 1984. Zenith covers an area of eighteen acres and is located at 1415 North Water Street, in Clinton, Missouri. We manufacture and wholesale consumer fireworks. Zenith is the exclusive United States manufacturer of Black Cat fireworks. We also carry an exclusive line of Brothers Pyrotechnics, including a large assortment of 500 gram items. Zenith manufactures a variety of fireworks, ranging from small wing items and missiles to multi-shot tube items. Please take time to view our products online.