Other Fans for cooling, ventilation, creating required air flow. Diameter – 250 mmNumber of blades – 10 pcsRPM – up to 10000Productivity to 10 cbm/min Diameter – 430 mmNumber of blades – 8 pcsRPM – up to 6000Productivity to 10 cbm/min Diameter – 1400 mmNumber of blades – 8 pcsRPM – up to 3000Productivity to 20 cbm/min