Do they make replacement sponges in this size?

D'Addario does not offer replacement sponges for this size. They do for the larger size for guitar, but not this size. Your choices would appear to be either buy the larger sponges (they're on here in packs of 3 - item GHRS) and cut them down to fit, or by another humidifier.

Hello, I have a form fitting case for my erhu (Chinese violin) and would need to know the exact dimensions of this humidifier to see whether it fits?

The humidifier itself is 3x2x1. 5x5x1.5 are the dimensions of its packaging.

Does this work in a soft canvass case?

Remember that the sponge needs to be damp but not soggy and the use of distilled water. I have used it in one of my soft cases and have not seen any mildew. I have been using the humidifier for only three months, during the summer, and so far it is what I needed.

Would this work for ukulele

Yes this would work great for a ukulele!

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Small Instrument Humidifier

Product ID: 51038921

Details

Brand
Planet Waves
Special feature
Adjustable
Colour
Original
Filter type
Wick
Floor area
0.01 Units

💧Slow, even moisture release

📏Compact 12.7cm size fits any case

🧽Durable cellulose sponge material

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Description

💧 Keep your sound flawless—moisture mastery in your pocket!

SAFE RELIABLE - Crafted from safe cellulose sponge material, guaranteeing no harm to your valuable instruments.
PERFECTLY PORTABLE - Small size designed to fit seamlessly in any instrument case, ensuring protection on the go.
GENTLE MOISTURE CONTROL - Releases humidity slowly and evenly to maintain optimal instrument condition without risk of damage.
PROUDLY MADE IN THE USA - Quality you can trust, supporting local craftsmanship and durability.
UNIVERSAL COMPATIBILITY - Ideal for smaller acoustic, bowed, and woodwind instruments—one humidifier for all your delicate gear.

The Planet Waves Small Instrument Humidifier is a compact, cellulose sponge humidifier designed to fit any small acoustic, bowed, or woodwind instrument case. It provides slow, even moisture release to protect instruments from drying out, ensuring longevity and optimal performance. Lightweight and safe for all instrument types, it is proudly made in the USA.

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Sold byAmazon UAEDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Product Dimensions	12.7 x 3.81 x 12.7 cm; 12.25 g
Item model number	PW-SIH-01
Body Material	sponge
Colour	Original Version
Material Type	Cellulose
Country Produced In	USA
Size	1
Item Weight	12.2 g

Small Instrument Humidifier

Details

Details

Description

Specifications

Common Questions