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Forty white cylindrical filter sticks, each ten centimetres long and point three inches thick

40 Pieces Humidifier Filter Cotton Refill 4 Inch

SKU CH-YB44-Q7XN4

Pack of 40 white cotton filter sticks, each 10 cm long and .3 inch wide, for portable USB humidifiers

  • 40 pieces included so you have plenty of spares
  • 10 cm length fits most portable USB mini humidifiers
  • .3 inch diameter matches common filter slots
  • Strong water absorption keeps mist output steady
  • Replace every 1 to 2 weeks to extend humidifier life

40-piece humidifier filter refill

This pack supplies 40 white cotton filter sticks, each 10 cm long and .3 inch in diameter, designed for portable USB-powered mini humidifiers. The quantity covers several months of routine changes for personal desktop, bedroom or car units.

Capacity and replacement cycle

Each stick absorbs water evenly through uniform pores and maintains stable volatilisation for roughly one to two weeks before output drops. When mist weakens or the device runs hotter, swapping the stick restores normal output without tools.

Fit and installation

Sticks trim easily to match the original wick length and slide into most personal USB humidifiers in seconds. Soak fully in tap water before inserting; avoid soaking in essential oils, though a tiny drop added after installation is acceptable.

How it compares

Measured against everything we stock in Humidifiers & Mist Diffusers, at today’s prices. Recalculated every night.

Price $8.99
Cheaper than about 98% of the 132 comparable items (median $25.49).

Specifications

No published specifications for this item yet.

Questions about this item

Will these 4-inch sticks fit the mini USB humidifier I already use?

Each stick is 10 cm long and .3 inch in diameter; measure your old wick and trim the new one to match before installing.

How do I know the new filter is working right after I put it in?

Soak the stick until fully wet, insert it, then run the unit — steady mist output and no overheating mean the wick is feeding correctly.

What comes in the pack and is anything else needed?

The box contains 40 white cotton wicks; no extra parts are included, just supply tap water and avoid dripping essential oils directly on the filter.

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