Are any replacement parts available for it?

Yes, there is a replaceable sponge.

Is it easy to refill without making a mess?

Yes, the accessory has a drip bottle that can be easily filled with water.

How long can one refill last?

Based on different environments, you can view the real-time dial to determine how much water to add.

Does it prevent whistling during guitar playing?

Yes

What size of sound hole is it suitable for?

The size of the sound hole ranges from 100mm to 110mm

Product description

As JOYO has become a mature brand of effects pedals and amps, we established a new brand named , specializing in accessories!

Guitar string winder cutter, bridge pin puller

All in One Guitar Care Kit

Soundhole Cover

Solid pedal board, adhesive or zip ties

Easy storage, for acoustic, ukulele, basses, electric guitar and etc

Features a built-in phone/Tablet holder

Allowing you to focus on your music without distractions

Self lock by gravity mechanism, which locks the instruments firmly.

Pocket Guitar Tool Aluminum alloy

Good value, sturdy, compact, and looks good

Gas spring one button easy and smooth lifting function

Patent design, 2 in 1 humidity care system for acoustic guitar

Soundhole double pickup for classic acoustic guitar

From the brand