When replacing glow plugs it is necessary to clean the glow plug aperture to ensure the new glow plug can transfer its heat to the engines incoming airM9 glow plugs are specific to Alfa Romeo, Vauxhall, Fiat and Saab engines. Application list available.Clears carbon deposits prior to fitting glowplugs.Cleaner tip designed for 8.9mm glow plugs with 5mm diameter tips.Required to ensure new glow plugs effective operation.Made in Sheffield.