It Diagnoses Problems Quickly With 2 Rubber Cones Ends Which Do Not Need To Thread Into Head. Our Item Is Suitable For Petrol Engines On Lawn Mowers, Motorbikes, Cars, Trucks And So On. Includes 17.7" extension hose with 4 sizes (10mm, 12mm, 14mm, 18mm) selectable brass adapters, suitable for petrol engines on motorcycles, cars, trucks, ATVs and more.