DescriptionThis is a universal guitar humidifier that can protect your precious instrument from shrinking, warping and cracking under dry and difficult conditions. It can release water evenly and slowly in the guitar without actually touching the instrument. This humidifier uses high-quality materials and can serve you for a long time.Features-Color:Black, yellow, lavender.-Material: ABS, sponge.-Size: About4.00X11.30X4.00cm/1.57X4.44X1.57inch.-Macaron color matching is very lovely and fashionable, and it looks very sweet.-The sponge has strong water absorption capacity and can be well humidified.-The humidifier uses an anti-mold sponge to effectively prevent the growth of mold.-Balanced humidification, 30 ventilation holes, all-round humidification for your guitar.-The special cards string design will not stretch the strings excessively and cause damage to the strings.Packing list3 x guitar humidifiers