Boveda for Musical Instruments 2-Way Moisture Control with 49% RH Size 70 Wooden String Prevents Cracks and Warped Wood Pack of 20

Create the perfect moisture balance for your wooden instrument - adapted to its environment - with the world's leading supplier of 2-way moisture control. Easy moisture regulation for plucking, string and woodwind instruments: for acoustic/electric guitars and basses, violins, violas, cellos, double bass, ukuleles, mandolins, banjos, bassoons, oboes, clarinets and more Prevents warping wood and cracks: Boveda maintains precise relative moisture (rF) between 45 and 55%. Recommended for most climates with 3 and 4 seasons. (Highly absorbent Boveda products are available for climates with high humidity.) Easy to use. No more water moistened sponges or foam products or hoses for moistening! Simply place Boveda in a protective, leak-proof fabric bag (sold separately), place it in the instrument case and leave it closed whether the instrument is inside or not Lasts 2 to 6 months, depending on instrument case, season and climate. Replace the product when the contents are firm. All natural salts and pure water sealed in a leak-proof membrane. Seal the resealable packaging to keep the unpacked Boveda bags fresh for up to 2 years