Hach NitriVer 3 Nitrite Reagent Powder Pillows, 5 mL, pk/50

Got a box of Hach NitriVer 3 powder pillows for testing nitrite levels. These are for 5mL samples and there are 50 in the pack. Box is a bit worn but the packets inside are good to go if you need to check your water quality. Pretty standard stuff for lab or field work.