These Reagents are for use with the Nitrite Pocket Checkers. Each box contains enough for 25 tests.
Please choose the Low Range Reagent (HI-707-25) for the Low Range Nitrite Pocket Checker and the High Range Reagent (HI-708-25) for the High Range Nitrite Pocket Checker.
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I don't know how you got a book printed 26 years ago in the conditions that I received it (like new) but you do it! ABSOLUTELY AWESOME!
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