I carry a hygrometer in my ammo boxes with one of them. Without them, the relative humidity is about 55%. With one, it drops to 35%. They work. Just charge them every few weeks.
9 Pack 12Ml/Cc Dental Syringe W/ Curved Tip & Measurement - Disposable Graduated For Oral Care, Tonsil Stones Removing, Lab Use, Feed Small Pet
25 Review
Contact lenses Bausch & Lomb Soflens Daily Disposable, 90 pcs., R 8.6, D -7
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LifeStraw Go Water Filter Bottle: The Ultimate 2-Stage Integrated Filter Straw for Hiking Adventures
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Graduated Erlenmeyer Glass Flask Set With Narrow Mouth - 500Ml Capacity
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14 Review
ULAB Scientific 1000Ml Borosilicate Glass Beaker With Printed Graduation - Durable And Accurate For Lab Use (UBG1005)
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