Boveda B49 Humidity Control Refill Pack - 4 Pack

Replace Boveda packets every three months. Just slip these refills into the Boveda Holders from your B49 Standard Starter Kit and slide them back into your case. 

Using Boveda to balance humidity in an instrument case:

• Requires zero maintenance—no more filling messy hoses and snakes and wetting sponges
• Maintains an ideal relative humidity range for instruments—40-60% RH
• Prevents wide fluctuations in humidity that cause the wood to expand or shrink, and degrade its performance abilities