Product review (1 stars): Don't bother using an inferior product such as this
Not worth a purchase. These DO NOT bring levels up to 62% humidity. Monitored with a hygrometer they only read 55%. Even after placing two of them in the jars I am curing in they do not raise the level past 55%. I will never purchase these again. Stick with Boveda. When using Boveda in the past I had no problems & never needed to try two in a jar. This product is NOT AS ADVERTISED.