... (Three 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 ... Body Size, Port Size 1/8", Auto Drain Type AC2000-02 Air source treatment Unit (F.R.L Combination)