Boveda One-Step Hygrometer Calibration Kit - 75% RH - Standard Small
<div style="text-align: left;"><strong>[Product Information]</strong>
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<li id="replacementPartsFitmentBullet" class="aok-hidden" data-doesntfitmessage="We're not sure this item fits your " data-fitsmessage="This fits your "><span class="a-list-item"><span id="replacementPartsFitmentBulletInner"><a href="#" class="a-link-normal hsx-rpp-fitment-focus">Enter your model number</a>to make sure this fits.</span></span></li>
<li><span class="a-list-item"> Simply place your hygrometer inside the bag， close the zipper， and wait 24 hours. A perfectly-calibrated hygrometer will read 75% RH. If your hygrometer reads above or below 75%， adjust the calibration by the number of percentage points it is off from 75%. </span></li>
<li><span class="a-list-item"> Completely maintenance free - no activation required. Easy to use. </span></li>
<li><span class="a-list-item"> Bag Dimensions: 4.5-Inch x 9-Inch. </span></li>
<li><span class="a-list-item"> Lasts approximately one year， good for multiple calibrations. Shelf life before opening is a minimum of 2 years. </span></li>
<li><span class="a-list-item"> Produces an environment of 75-percent humidity </span></li>
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