Medem SW-AF-KIT Airflow Pressure Switch Kit, DSP200 Adjustable differential.Cover in shock-proof self-extinguishing thermoplastic.Diaphragm: Silicone Rubber.Switch contact rating: 250V 1.5A (0.4).Switch: SPDT.Protection: IP54 PVC grommet for cable entry MEDEM-SW-AF-KIT-AIRFLOW-PRESSURE-SWITCH-KIT-DSP200 [PDF]