1. The heat transfer is indeed the best cooling effect. This cooler adopts multi-tube type with large cooling area and good cooling effect. 2. Sufficient cooling area The number of copper tubes used in this cooler is more than three times that of the fin tube type and the rolling tooth tube type. The cooling area is calculated based on the surface area of the copper tube to help the cooling area. 3. The cooling pipe material is most suitable for heat dissipation. The thermal conductivity of pure copper pipe is above 0.95. Note: 1. This product is only suitable for fresh water. 2. The working pressure on the oil side is 1.0Mpa; the working pressure on the water side is 0.5Mpa. 3. In the season when the cooling water may freeze, the water in the cooler should be discharged when it is not working.