Curing jar lid with hygrometer fits Wide mouth Jars

DescriptionBPA Free Plastic Curing Monitor Jar Lid (Operation:Long press the key 1.5 seconds to power ON/OFF, double-click to swith °C / °F.To ensure accurate measurements) jar lids contain a built-in, air-sealed digital hygrometer to help you measure humidity and temperature better within your curing jar,Fits all wide mouth 86mm