Various sizes: 133mm ~ 400mm, including: 133x61mm, 175x62mm, 190x64mm, 200x65mm, 220x63mm, 225x90mm, 250x80mm, 280x80mm, 280x112mm, 310x108mm ,310x140mm , 355x147mm ,355x170mm , 400x141mm Voltage: 12V, 24V, 28V and 48 VDC Application: HVAC,AHU,Communication Cabinets,Air Cleaner Laminar Flow Cabinets,Biosafety Cabinets,Fumehoods etc.