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A: HI93754A-25 - COD Low Range Reagent Vials, EPA Method (25 tests) - HI93754A-25
B: HI94754B-25 - COD Medium Range Reagent Vials with Barcode, EPA Method (25 tests) - HI94754B-25
C: HI93754C-25 - COD High Range Reagent Vials, Dichromate Method (25 tests) - HI93754C-25
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