Our ZHANXUBIO Airtight Mason Jar Lids offer a perfect blend of functionality and precision with their built-in digital hygrometer. Designed to replace traditional metal seals, these lids maintain an airtight environment essential for preserving the quality of your harvested goods. The hygrometer allows you to monitor humidity levels, ensuring your herbs, flowers, or other items cure properly. The BPA-free plastic material ensures safety while providing durability, making these lids a reliable solution for long-term storage and curing in home kitchens.
  Ideal for both herb and flower curing, these 2-piece lids provide an efficient way to maintain optimal moisture and temperature levels during the curing process. Available in yellow, they are a stylish and practical addition to any mason jar setup. Whether you are using wide mouth or regular mouth jars, these lids fit perfectly and offer a complete monitoring solution to help you achieve the highest potency and quality from your harvest.