Feature: 1. Circulating Heating: Heating with water, the cold water is turned into hot water through heat energy, suitable for the simultaneous use of solar panels (not shipped with solar panels). 2. Specially Designed Built‑In Flow Restrictor: Make sure maximum heat exchange, designed to minimize pressure loss in the heating system. 3. High Quality Materials: Made of high quality stainless steel material, corrosion resistant, rust proof, and durable. 4. Easy To Install: Equipped with stainless steel fixing brackets, easy to install and use, small and compact, requiring minimal installation space. 5. Wide Range Of Applications: Suitable for all types of swimming pools, spas and hot tub, hot springs. Specification: Item Type: Swimming Pool Heat Exchanger Material: Stainless Steel Color: As shown in the picture Product Size: Approx. 27.5x16cm / 10.8x6.3in Weight: Approx. 3082g / 108.7oz Side Thread: Female thread 45mm / 1.77in Front and Rear Threads: Female thread 32mm / 1.26in Specification: 25KW Maximum Working Temperature: 230°F (110°C) Application: Suitable for all types of swimming pools, spas, hot tubs hot springs Pool area (gallons) Requires increased temperature 1℉/hour Requires increased temperature 2℉/hour Required boiler (btu/hour) Model of heat exchanger Required boiler (btu/hour) Model of heat exchanger 2000 16.683 MF-80 33366 MF-80 4000 33.366 66732 6000 50.049 / / 8000 66.732 / / 10000 83.415 / / . Package List: 4 x Accessories1 x Swimming Pool Heat Exchanger1 x Instruction Manual Note: 1. Please allow 1‑2in error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.3. No electricity.