> :

> shawn I have the 3M 5000 mask (i think) $25 @ west marine and it came with
> the thin pre-filters. any idea how you attach them to the mask. there is a
> diagram on the bag that says there is a lever to open the cartrages, but
> my mask doesn't have a lever. Do you tape these pieces to the out side? Am
> I worring too much about it?

Something doesn't sound right, but I don't have the 3M mask, so I can't give you an accurate answer.

Shawn