Features: Universal: This brake cylinder sight glass will fit the majority of old Honda Suzuki Kawasaki lots of dirt bikes Harley's and many other brake cylinders. It can fit to your front or rear brake cylinder as long as its 18mm. Easy to Install:First completely remove old sight glass and brake fluid. Place the rubber seal in the sight glass hole and gently press the piece in to the hole. Cover the face with a soft cloth or towel to prevent damage and carefully tap into place with a hammer. Easy to Clean:First empty the engine oil and remove the clutch side cover. Use gasoline and brush to clean the side cover and focus on cleaning the sight glass. If necessary use carburetor cleaner.Check to make sure the face is flush and even with the font face. Precise Replacement: Brake cylinder sight glass is constructed to match the casting material of the original part and ensure similar performance. Quality Assurance: Our product will definitely win your heart with its high quality If you have any inquiries please contact us. Specifications: Meterial: Glass Diameter: 12/18mm includes: 1 * Brake Cilinder Sight Glass 1 * Rubber Seal