[Budget-Friendly]: You receive 60 pieces 5n11 Filter. It is more budget-friendly than single filter.60 pieces of 5N11 Filter can be used 30 times, so you basically don't have to worry about lacking it in two months. [Filtering Efficiency ≥ 95%]Our high-quality electrostatic filter cotton has higher adsorption capacity and low respiratory resistance, which can better defend our respiratory health. Respirator cartridges cotton a wide range of nonoily particles such as dust, PM2.5, pollen, welding fumes, etc. [Recommended Usage Time]The 5N11 particulate filter cotton generally lasts 8 hours. When the filter cotton is damaged or dirty, has a strange smell, or has significantly increased respiratory resistance, you should leave the contaminated area promptly and replace the 5N11 filter cotton. [Compatibility]The 5N11 filter needs to be installed on the 6001 and cannot be used alone. Compatible with 6200/6502/6800/7502/FF402 respirators. Color: White Material: cotton Package Contents: 60PC