[Supporting products] The 2091 p100 particle filter retainer is used together with the 6000/7000/6200/6800 FF-400 series retainer and cannot be used alone. Please confirm that this is the model you need before placing the order. [Material] High static electricity filter material, non-woven fabric, melt-blown cloth, hot-air cotton. The filtration efficiency is at least 95%, and the breathing is comfortable. It is recommended to use in the environment containing some non-oil-based particles. [2091 Scope of Application] It is applicable to solid particles, spray liquid, oily particle welding, metal heat treatment and other metal smoke, radioactive particles (such as uranium and plutonium), asbestos and dust. [Replacement time] 40-hour protection is the reasonable expectation of each respirator filter. However, when you feel that the respiratory resistance is obviously too high. The body will feel uncomfortable, or when the filter is dirty or damaged, replace the filter cotton immediately. [Warm note] This product cannot produce oxygen. Please do not use it when the oxygen concentration is lower than 19.5%. Color: as shown Material: cotton Package Contents: 20 x p100 filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.