2091 filters are compatible with many types of respirator, like 6200, 6001cn, 6502QL,6800 and 7502 respirator2pcs 2091 filters need to install on the respirator using. The respirator with 2091 filters can be used in many works, for example:woodworking work, cleaning work, asbestos work, lead paint work, epoxy resin work, Grinding Work, Welding work2091 filter is made of high electrostatic filter material, non-woven fabric, Meltblown fabric, hot air cotton.as at least a 95% filtration efficiency, Recommended for use in environments containing certain non oil-based particles.When to Change the 2091 Filter Cotton?The 2091 filter cotton is usually replaced in about 8 hours. You can extend or shorten the service life according to the work environment.Note: the filter cotton can not be washed.Colour:As shownMaterial:activated carbonPackage Contents:6 x p100 filterOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.