Material
|
Non-woven, melt-brown, polyester needle-punched cotton
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Nose bar
|
90 (±6%)x5 (±5%)mm
|
Sponge
|
90 (±10%)x 10 (±9%)x5 (±8%)mm
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Elastic stripe
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Up:320 (±10%)mm, down:280(±10%)mm, width:7(±8%)mm
|
Exhalation valve
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No
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