This HACH Sulfite Test Kit SU-5 is an accurate and reliable tool for testing sulfite levels in water samples. It comes various amounts of three reagents, 2203-99, 1055-99, and 705-32 & glassware as shown and which are necessary for the test. The kit is designed for use in the business and industrial sector, specifically in the water treatment and quality testing industry. The kit is made by HACH, a trusted brand in the industry, and is model number SU-5. With this test kit, you can easily and accurately determine the sulfite level in your water samples, ensuring that your water is of the highest quality.