The OS Engine Glowplug No.8 (Medium) is probably the most well-known glow plug in the model aircraft world. Renowned for its reliability and consistent performance, this medium-heat glow plug is ideal for almost all 2-stroke engines, making it a go-to choice for sport, training, and competition pilots alike. Designed and manufactured by OS Engines, the No.8 glow plug delivers smooth engine runs, dependable starting, and excellent throttle response across a wide range of operating conditions. Key Features Medium heat range – extremely versatile Ideal for most 2-stroke glow engines Excellent ignition reliability Smooth idle and consistent running Long service life with OS quality engineering Perfect For 2-stroke glow engines Sport and aerobatic model aircraft Trainers and everyday flying Pilots wanting a reliable “fit-and-forget” glow plug Product Summary The OS Engine Glowplug No.8 is the industry standard medium-heat glow plug. Trusted worldwide, it offers outstanding all-round performance and reliability, making it one of the most popular glow plugs ever produced. Specifications Brand: OS Engines Model: No.8 Heat Range: Medium Engine Type: Glow (2-Stroke) Thread: Standard glow plug thread Why Buy from Probuild Aircraft ✅ Official UK OS Engines stockist ✅ 100% genuine products ✅ Trusted by top international pilots ✅ Fast UK shipping ✅ Supplying pilots since 1993