Boveda 49% RH Refill for Wood Instruments - 4 Pack

If you need to keep many instruments playing and sounding great, buy Boveda in quantity. A brick of Boveda has less packaging, but plenty of refills for Boveda Starter Kits. For professional musicians, luthiers, guitar techs and players of multiple fretted and bowed instruments and woodwinds.

Features

• Requires zero maintenance-no more filling messy hoses and snakes and wetting sponges
• Maintains an ideal relative humidity range for instruments-45-55% RH
• Prevents wide fluctuations in humidity that cause the wood to expand or shrink, and degrade its performance abilities