The Integra Boost 320-Gram 2-Way Humidity Control Pack (62% RH, 40/pack) is a high-capacity solution designed for large-scale humidity control. Utilizing patented 2-way humidity control technology, these packs actively absorb or release moisture to maintain a stable 62% relative humidity (RH) environment.Ideal for bulk storage applications, these 320-gram packs are perfect for use in ... https://www.hydroponicstown.com/integra-boost-320-gram-2-way-humidity-control-at-62-rh-40-pack