Pneumatic Equipment for Clean Room Standard Clean Gas Filters Description Clean gas filter Cartridge type SFA100/200/300 SFB100 SFB300 SFC100 Series Particle generation grade 1 1 1 1 Standard Clean Air Filters Description Clean air filter Disposable type Clean gas filter Cartridge type Clean gas filter Disposable type Clean gas filter Disposable type Clean air filter Cartridge type Clean air filter Cartridge type SFD100 SFD101/102 SFD200 Series Particle generation grade 1 1 1 Particle Generation Grade Values in show grades. 80