Refill pack of 4 x Boveda 49% humidity pouches in a re-sealable bag. To use with cloth Boveda holders for large or small instruments (see instrument kits under separate listings).
70 gram 49% refills are used with Violin, Viola, Cello, Double Bass, Acoustic and Electric guitars, Bass Guitar, Mandolin, Ukulele, Clarinet, Bassoon and Bass Clarinet + more
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