One-way exhaust valve N95 mask breathing valve

ParameterValueProduct NameMask Accessory ValveMaterialPP (Upper Cover + Lower Cover), Silicone (Gasket)Outer Diameter35mmMask Opening Size24mmProduct ColorBlackGasket ColorTransparentProduct FeaturesEffortless breathing, smooth exhalation without stuffiness, compatible with all masksProduct ApplicationInstalled on masks; blocks harmful substances in air, reduces accumulation of hot and humid gas, lowers temperature inside masks, and makes breathing more comfortable