Ventilair's Cabinet Fans are available in Single and Double skin configurations with high efficiency Fans and Blowers. Blades Type - Backward, Forward, Radial. Diameters - 160 MM to 1200 MM. Air Flow - 1,000 CFM to 50,000 CFM. Pressure - 20 MMWC to 500 MMWC. Base Frame - Mild Steel/Galvanised Iron. Filters - Pre Filters.