ATS Heat Exchangers are offered in 49 different options to meet a variety of needs. Lengths range from 5.8 to 21.9 inches. Widths range from 5.8 to 14 inches and heights range from 1.8 to 2.6 inches. These Heat Exchangers have available tube diameters of 0.375 and 0.5 inches. Each Heat Exchangers is customizable and available with or without a fan.