The D'Addario Two-Way Humidification System Replacement Packets are a 3-pack of Humidipaks meant to be used as a replacement for the originals found in the D'Addario Two-Way Humidification System. Each refill pack will come sealed in an airtight mylar package, keeping the Humidipaks fresh until you are ready to use them. Eack Humidipak is custom made by Boveda for D'Addario to ensure a leak free, safe and reliable humidity control, which will keep your instrument at the manufacturer recommended 45% relative humidity year round. Each pack of Two-Way Humidification System Replacement Packets will last from 2-6 months after opening, depending on your local climate.
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Please note: You are buying a refill packette of 3, not the entire kit. The entire kit can be found here.