AC Series Size AxB IP Rating Max Airflow Features MK280GAN (A)(68) Dia.245x100mm / 9.6inch IP68/69K 1300~450 CFM Reverse Airflow MK280GAN (68) Dia.245x100mm / 9.6inch IP68/69K 1300~450 CFM Metal Impeller MK254GAN (68) Dia.219x87mm / 8.5inch IP68/69K 1000~370 CFM Metal Impeller MK254GAN (3)(68) Dia.219x87mm / 8.5inch IP68/69K 1000~370 CFM Metal Impeller MK205RAN (A)(68)(MS) Dia.189x74mm / 7.4 inch IP68/69K 570~209 CFM Reverse Airflow, 3-Phase MK205RAN (A)(68) Dia.189x64mm / 7.4 inch IP68/69K 570~209 CFM Reverse Airflow MK205 (68) Dia.197x79mm / 7.8inch IP68/69K 630~220 CFM Metal Impeller MK200RAN (68) Dia.172x79mm / 6.8inch IP68/69K 485~160 CFM Metal Impeller MK200FAP (68) Dia.172x71mm / 6.8inch IP68/69K 485~160 CFM Metal Impeller MK180F (68) Dia.160x80mm / 6.5inch IP68/69K 410~210 CFM Metal Impeller MK172E (68) Dia.140x56mm / 6inch IP68/69K 220~100 CFM Metal Impeller