Boveda Large Starter Kit - Boveda 2-Way Humidity Control for Wood Instruments - 49% RH

Large Instrument Humidity Control Starter Kits Boveda 2-Way Humidity Control keeps large instruments like celli and bassi in the ideal humidity zone for months while minimizing humidity fluctuations that can damage your instrument. Achieves and maintains a constant relative humidity (RH) range between 40% and 60%, the industry standard for wooden instruments. EACH LARGE KIT INCLUDES: One (1) Double (2-Pouch) Boveda Holder One (1) Single (1-Pouch) Boveda Holder Three (3) Boveda Refill Packets Step-by-Step Instructions Each Boveda in these kits is individually overwrapped. An unopened Boveda is good for up to two (2) years. Replace Boveda 2-Way humidity packets every three (3) months. Contains food-grade salt, purified water, and a food-grade thickening agent sealed inside a leakproof membrane.