MOQ. 1 Set. VVKB coolant heater is popular for features like easy-to-install, low fuel consumption and low noise. Customers can use it to heat the engine on trucks (or any other vehicles) and can also use it to heat the water so they can enjoy hot bath in their RV or log cabins. The glow plugs VVKB uses are made by Kyocera, which makes heater