Tube and Fin: it has a tube that allows the transmission fluid to flow to the aluminum fins that disperse the heat and cool it.Beside,This is the least expensive and simplest type of transmission cooler.
Universal Aluminum Oil Cooler 19Row 10AN Transmission Cooler Kit w/ Braided Hose
15 ROW 10AN FIT FOR UNIVERSAL TRANSMISSION OIL COOLER+7" FIXED COOLING FAN KIT
15 Row 10an Fit For Universal Transmission Oil Cooler+7" Fixed Cooling Fan Kit
16 Row Universal Transmission Oil Cooler 10AN Aluminum w/ Full Install Kit
30 Row Aluminum Universal Transmission Oil Cooler AN10 w/ Complete Fitting Kit
15 Row Fit For Universal Engine Oil Cooler + Filter Adapter Kit + 7" Coolig Fan