Description: Bullet Connector Diameter: about 3.9mm. Japanese style Motorcycle 3.9mm /4mm Bullet Connectors / Terminals. Commonly used on motorcycle, scooter / moped, car, kit car, atv/ quad bike, trike / tricycle, caravan, marine, narrow boat, barge, jet ski and boat repairs, projects and restorations. Also found on a lot of Japanese motorcycles. With insulator sleeve cover, enhance safety. Long service life Specification: Easy to install and use Can be used to connect internal wiring Material: Plastic and metal Colour: Silver and Clear Package Includes: 10 Pieces 3.9mm Tin Plated Male Bullet Terminals 10 Pieces Male Clear Insulation Covers 10 Pieces 3.9mm Tin Plated Female Bullet Terminals 10 Pieces Female Clear Insulation Covers (40 Pieces in Total = 10 Full Sets)