Tongshi heater core is produced from high quality anti-corrosive aluminum material which lengthens the working life of the heater. The fin is proportionally constructed with a fin height of 5mm increasing the dissipation area of the core. Advanced anti-corrosive technology has been applied to the heater pipes for long service life. With these features , each Tongshi heater core delivers higher preheating efficiency, even temperature rising heating up your compartment to a cosy driving environment in a short time. All our heater core is manufactured with new production process to achieve quality assurance and competitive price. All the heater core is leak tested under a pressure of 1.5Mpa. Our professional R&D team is capable of developing and customizing heater models exactly the same against your samples or OEM products. Tongshi offer you efficient design and development service!