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Russian Tag is gel seal filter
Gel Seal Hepa Filter gel seal air filter hepa filter h14
The TOP Side Gel Seal HEPA Filter adopts the liquid sealed technology and is a kind of method better than the commonly used seal mechanical pressing device.
The Gel Seal is easily to be installed.
The seal is very reliable, so its terminal filtration effect is better than ordinary products
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gel seal filter,filter,hepa filter 
