The Ultimate In Cooling, Stacked Plate design Offers Maximum Cooling With Almost Bullet-Proof Strength. Aircraft Quality Aluminum, flexless Oven Brazed Construction. Cross-Path Airflow. Insignificant Pressure Drop. Twice The Cooling In Half The Size! Painted Black For Heat dissipation. Fitted With 1/2" Female Pipe Thread Fittings Mounting Dampeners Are Recommened.