Nickel Alert is a substance that can test for nickel in 30 seconds. This may be helpful for musicians who know that they are allergic to nickel but may be unclear as to whether their instrument contains nickel. This product may also be a helpful tool for educators to keep handy and test school instruments with. You can perform over 100 tests with one bottle of Nickel Alert. Nickel Alert is available for $18.50 a bottle.