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Hardness Test Strips 30 Packets
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No Charge for shipping on this item. Ships by ground for FREE.
Test strips, 30 packets with color chart. Easy to read and use! Individually wrapped; Test for 0 40 80 120 180 250 425 1000 ppm (mg/L) OR 0 2 5 7 11 15 25 58 gpg
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