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Your cart is empty.All Oasis cylinder style humidifiers need Humigel Crystals to prevent water leakage. We recommend that players replace the crystals once a year. The OH-4+ will fill 14 more Oasis humidifiers than the OH-4 refill kit (20 refills per kit). This is an excellent alternative to the OH-4 (6 refills per kit) kit for players with many instruments to humidify and already have purchased the OH-4 refill kit that includes the measuring spoon, syringe and instruction. The OH-4+ kit only has bulk crystals and no measuring spoon, syringe and instruction.
Gerald Fehr
Reviewed in the United States on November 24, 2024
Would love to rate it but haven’t received it yet
Jacky O'Brien
Reviewed in the United States on November 16, 2024
If you use the Oasis humidification system for guitars and other wood instruments, throw out what's in your current humidifiers (it gets old and funky), and replace it with this. Perfect when humidity gets below 40%. Check them at least once per week.
C. DeMarco
Reviewed in the United States on October 20, 2024
I've been using this humidification system for years now for my classical guitars, and am totally satisfied. Affordable, and does what it's supposed to. Definitely recommended.
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