DC Series Size AxB IP Rating Max Airflow Features SDK1238AN (E)(68) Dia.108x41mm / 4.3inch IP68/69K 105~65 CFM SDK1238 (68) Dia.108x36mm / 4.3inch IP68/69K 105~65 CFM SDK1225AN (E)(68) Dia.113x29mm / 4.45inch IP68/69K 86~45 CFM SDK9225 (68) Dia.86x26mm / 3.3inch IP68/69K 66~25 CFM SDK8025 (68) Dia.72x25mm / 2.8inch IP68/69K 48~22 CFM SDK6025 (68) Dia.56x25mm / 2.2inch IP68/69K 38~12 CFM