Specification: Color:As shown Meterial:Glass Diameter: 18mm Quantity:1Set Fitment: Universal. This 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. Installation: 1) Completely remove old sight glass including metal ring and rubber gasket. Be sure the reservoir is drained of all brake fluid and has been washed. 2) Place the rubber seal in the sight glass hole. 3) Gently press the sight glass piece in to the hole. 4) Cover the face with a soft cloth or towel to prevent damage and carefully tap into place with a hammer. Check to make sure the face is flush and even with the font face. 5) Fill with brake fluid, bleed the brakes, and get back to riding safely Features: -Easy to install -Universal and Easy to Install -This is a replacement for your master brake reservoir sight glass -Comes with the proper gasket for sealing in the brake fluid