I looked for the diameter and thread of this item. none were available. I ordered it because enough time is spent trying to purchase this type of thing. The filters do not fit my mask so they are no use unless I now buy a mask to suit the filters. disappointed but cannot find any problem with the filters just quality of info supplied.
Verified purchase: Yes | Condition: New
WORKS VERY WELL WITH THE ADVANTAGE THAT WHEN USED WITH GLASSES THERE IS NO MISTING UP
Verified purchase: Yes | Condition: New
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