... , extend their working life.(1) Filtering Grade: 25 μm(2) Proof Pressure: 1.5Mpa(3) Max. Working ... Combination) (1) All Models: AC2000-01, AC2000-02, AC3000-02, AC3000-02, AC4000-04,AC4000-06, AC5000-06, AC5000-10 ... (2) Metal Protective Hood: AC2000-01, AC2000-02 are not available. Others have metal hood.Selection Criteria ... 1/8", Auto Drain Type AC2000-02 Air source treatment Unit (F.R.L Combination)