ITEM NAME:Hot 18mm Master Brake Cylinder Reservoir Sight Glass Motorcycle Bike G Dirt J3D0 Description&Preview.(It can fit to your front or rear brake cylinder as long as its 18mm. 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.
