Sale! MyPharmLid Mason Jar Lid Built-In Stash Hygrometer Fahrenheit $19.99 $14.99 MyPharmLid, BPA Free Plastic Curing Monitor Jar Lid. Our Ball wide-mouth mason plastic curing jar lids are designed to replace the metal seal and lid that came with the wide-mouth or 32oz mason jars you already own. Mason jars are a great storage solution for your harvested herbs — keeping them inside with an air-tight seal. Our curing jar lids contain a built-in, air-sealed digital hygrometer to help you measure humidity and temperature, which are vital components that must be monitored in order to achieve a proper cure — finally unleashing the highest potential and potency from your flower. Other curing lid products are on the market, but none are up to the ultra-high standard that MyPharmJar holds. Each unit is proudly hand assembled in Portland, Oregon, and comes with a high-quality user-replaceable SR/LR 44 battery. All sensored jar lids now support both Celsius and Fahrenheit, changeable via button Fahrenheit Temperature and Humidity sensor embedded BPA Free Lid Fits Widemouth Mason Jar Turns Wide-Mouth Mason Jar into powerful curing vessel Mypharmjar quality made in the USA Take your herb curing to the next level BPA-Free plastic child-resistant lid in black. Fits Wide Mouth Mason Jars Fits all Mason/Ball wide mouth jars. user-replaceable SR44 Battery included The sensor is sealed to ensure its airtight. The lid comes with tapered inner sealing ring If you are looking for the celsius version view cart {{#errors}} {{error_detail}} {{/errors}}