Features: Make of 304 Stainless Steel, with chemically Treatments, corrosion resistant. Swimming Pool heat exchanger is highly engineered for fast heating. High capacity and easy use. Feature high efficiency Heat Transfer Capabilities. Smooth tube and shell design ensures high velocities inside heat exchanger maximizing heat transfer. Suitable for Pool/Spa/Hot tub heating, outdoor wood furnaces, hydronic heating, forced air heating, floor radiants heating, snow melting, solar water heating. Specifications: Materials: 304 Stainless Steel Length: about 300mm/11.81inch Outer Diameter: about 130mm/5.12inch Silver Clamps Outer Diameter: 142mm (5.59inch)/143mm (5.63inch) Power: 24kw Package Includes: 1pc Pool Heat Exchanger note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.