Please Note: Glow plug voltage (ignition voltage) is 9V, suitable for 12V Car heaters Glow plug voltage (ignition voltage) is 18V, suitable for 24V Car heaters Features: Smallsize,lightweight.Excellentthermalperformance.Highheatingspeedandlow-temperaturestart-upperformance.Stablecharacteristics,highreliability. Specification: Condition: New Color:As Pictures Show Material:Ceramic & Plastic&MetalLength:approx.26.3cm(10.4inch)CeramicRodSize:approx.4.5x0.4cm(1.8x0.2inch)(LxD)Threaddiameter:approx.1cm(0.4inch) Current:4.8-5.5A Voltage: 12V/24V CompatibleWith:fitforEberspacherD2D4D4Sandotherairparkingheater. Note: - The two types of wrenches are different in appearance and have the same function. If you need to specify a wrench, please contact customer service, otherwise, it will be shipped randomly. Hope you understand. Thank you. - D2 and D4 D4S has the same glow plug, but they have different Burner Gasket and Motor Gasket. - The Gasket of D4 D4S are bigger than those ones of D2 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. We specialize in parking heaters and heater parts in China. Aftermarket parts for Webasto and Eberspacher are available here.