3D printed mask can use Designed filter case and 3M 6000series filter.

Update 2020-April-06, Some people says the Filter.stl has problem, now I have edit little bit and upload new file Mask-PLA-Filter-2020-April-06.stl, and separate stl pieces for the Filter set.

Update 2020-Feb-13, Add 2 more hole on top close to nose location, 2 versions, with and without logo

Update 2020-Feb-11, Modified One face piece file and PLA adaptor for both Design-filter-case and 3M 6000 series filter

Update 2020-FEB-10, Another set of files can fits 3M 6000series filter

Exchangeable filter with standard Surgery mask.

Improved Nose position more fits and air seal!!

Please consider to use if you thinks its good

Parts u need is M3x8mm countersink screw x 3pcs

2.5mm or 3mm Black rubber string ( approx 600 ~ 700mm )

0.2mm thickness silicone sheet cut it DIA 22mm for the breath valve,

If u dont have silicone sheet you can just use thin plastic bag to cut this valve!!

3M Foam tape, grey colour very soft one.

https://www.youtube.com/watch?v=fJNDgYunA4k&feature=youtu.be