About this 3D model

This is universal valve for any respirator, you have to modify the respirator first by making a hole for this valve. Make the hole in any reasonable place using the boolean tool in 3D modeling software. You need to provide the flap valve yourself, cut it from silicone sheet or flat rubber. diameter of the flap is 57.2mm (sorry for the strange number). There should be a filter to catch dropplets so it can actually stop spreading the virus. Use cosmetic tampons, a napkin or whatewer you can get hold of.