Love the ease of using the Boveda Large Starter Kit, Boveda Small Starter Kit and Boveda Directional Starter Kit to balance humidity in an instrument case? When it's time to replace expiring Boveda, this is the right number of packs for fretted and bowed instruments and woodwinds.

Using Boveda 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—45-55% RH
• Prevents wide fluctuations in humidity that cause the wood to expand or shrink, and degrade its performance abilities

A 4-pack refills:

• Directional Starter Kit
• Small Starter Kit
• Large Starter Kit
• Single Fabric Holder
• Double Fabric Holder