The ultimate in cooling efficiency. The Empi stacked plate design offers maximum cooling with almost bulletproof strength. Aircraft quality aluminum, flux less oven brazed construction. Cross path airflow effectively cools oil as air passes through as many as 16 paths across sturdy embossed plates. Insignificant pressure drop with twice the cooling and half the size. Painted black for fast heat dissipation. These coolers are all fitted with 1/2" NPT female pipe thread fittings. Make sure to use 1/2" NPT Male pipe thread fittings when mating a fitting to these coolers.