MIRA SAFETY M Full Face Respirator Mask Filter - 40 mm NATO Gas Mask Filter, Longest 20 Year Shelf Life, Vacuum Sealed NBC Filters

Of course it has not been used yet I don't have a use for it yet I got it to fit the mask that I have but it is considered to be one of the best filters you can buy for multiple occasions and it has a long life span I have studied filters and this one meets every need that someone may need for many different uses I will give this an easy five stars

Fits the standard gas mask that I have, comes vacuum sealed.

Hope I never need to use it for reals.

Just in case package came sealed

Shelf life 20 years, way overpriced though.

Haven't had to use these yet luckily but great to stock.

I bought this 40 mm NATO NBC filter for my Avon cm50 works pretty decent it does stick out a little bit but that's because this filter was not designed for the cm50 it is in the sense that it is the same thread size 40 mm NATO but however you want something more compact because you have a Avon cm50 as well I would recommend trying to find the actual Avon 40 mm NATO filters but all in all if you're just trying to get anything you can get your hands on that is 40 mm NATO and has NBC protection this is your best bet

you need a mask