Description Don't let its small size fool you. This sleek humidifier easily fits into any case to provide protection and prevent damage to your valuable instrument. 2-3/8″ Long by 3/4″ Diameter UPC: × Related Products Choose Options Boveda Humidifier Starter Kit MSRP: Was: Now: $22.99 - $29.99 Add to Cart D'Addario small instrument humidifier MSRP: Was: Now: $10.75