[Supporting product] 2097 p100 filter bracket can be used together with 6000/7000/FF-400 series bracket and cannot be used alone. Before placing an order, please confirm whether this is the model you need. [Material] High electrostatic filter material, non-woven fabric, melt blown fabric, hot air cotton. The filtration efficiency should be at least 95%, and it is recommended to use it in an environment containing some non oil based particles. [Prompt] This product does not produce oxygen. Do not use when the oxygen concentration is lower than 19.5%. [Replacement time] When the filter cotton becomes dirty and damaged, and the respiratory resistance increases significantly, please replace the filter cotton. Material: Flannel colour: As shown Package Contents: 6 x filters 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.