The Zerostart 280-0055 Thinsulate Thermal Battery Blanket Heater is a vintage part designed for motor vehicles. With a wattage of 50W and dimensions of 5"x28"x0.5", this insulation-type battery warmer is universally fitting and perfect for keeping batteries warm during cold weather conditions. The Zerostart/Temro brand ensures quality, making it a reliable choice for car and truck owners looking to maintain their battery's performance.