Features: EX Certified explosion proof fan is designed with an explosion proof switch. Static: 350Pa. Fan Diameter: 10″(250mm), perfect connect to anti-static flexible air duct hose in 10″. Axial blower features 350W explosion proof motor with high speed: 3450Rpm fit long time ventilation work, low noise 66dB(A). Reliable and built to last. Tough steel boxed frame to be portable. High output fans designed with strong suction. Diameter: 10″(250mm) and 6 thick blades offer large Capacity: 55m3/min. Two durable grills bring the fan’s continuous working safely and cleanly. For a long term stable standing, 4 rubber feet at the bottom are offered, besides, another 2 rubber feet are for easy replacement. Ideal for ventilation in panel beating, chemical and metallurgy industries.