. 90/10 cupro-nickel tubing is resistant to waterflow erosion and serves as an antifoulant. . Compact, one-piece design makes installation simple. . Streamlined header design reduces pressure drop in water flowing through the cooler. . External water travels more quickly to tubes increasing the heat transfer efficiency of the cooler. . Custom-sized for your engine specifications and operational requirements. . Available with through-hull type fittings or non-through-hull flanges. . PATENT PENDING.