Multi-cavity plate to simultaneously perform up to 6 tests at the same time. Includes a reference for test validation. Each kit allows for over 75 tests. Fresh and salt water. Color chart. All MultiTest test kits come with an easy-to-read color chart. It has a 5 cm viewing window to help isolate the color and match the test sample as closely as possible. Opaque multi-cavity test plate. All MultiTest test kits are performed on a white opaque test plate. The sliding color chart along with the six-cavity test plate allows for easy reading and comparison of multiple samples at the same time.