Vortex Hexagon CNC Cooler comes with 8CFM, 10CFM, 15CFM, 25CFM, 35CFM generators, which produce 580Btu/h (146Kal/h)~3500Btu/h (881Kal/h). All Vortex Hexagon CNC Coolers are made of Stainless Steel; it meets NEMA 4, NEMA 4X, and NEMA 12 ratings as IP 66 and IP55 for wash-down protection and resistance to oxidation and corrosion.