air mask filter v2

#### Hi guys.

This is updated and improved version of previous filter [version 1](https://www.thingiverse.com/thing:4287699)

#### 26.04.2020
Added nose clip model, added photo of assembled mask

#### 24.04.2020
Added two mask pattern, ***'mask patterns.zip'*** archive

#### 17.04.2020
Added two version of base plate heights 1.3mm and 2.6mm to use with fabric different thickness

#### 16.04.2020

I made new version slightly wider and shorter.
current diameter of inner filter part is 42mm

Besides added additional holes on cap in purpose to use more area of fabric to filter air.

Distance between base and box grooves is 2+mm, I have use artificional leather-like fabric for mask.

In this version I added four small rails for base and box of filter to correct positioning.

I you have any question be free to write me a letter