New 14 x 1.5mm magnetic "Dimple" drain plug. Has a magnet 1435 times stronger than the OEM drain plug. Attracts all metallic contaminants and keeps them from harming your engine, transmission or final drive. Fits the final drive of all K75, K100, K1100, R850, R1100, R1150, R1200C/CL bikes. Fits the transmission on all K75, K100, and K1100 bikes. Also fits the transmission on all R1200RT, R1200GS & GS ADV, and R1200R & S bikes. NOTE: some Airhead final drives and transmissions use this plug as well - IF YOU HAVE ANY OF THESE MODELS PLEASE CHECK YOUR BIKE'S PLUG SIZE.