10 pieces Brake Master Cylinder Inspection Glass with O-ring Motorcycle Window for ATV Diameter: 12 mm / 0.5 inch

Features: 1. Function: A perfect replacement for your old brake master cylinder sight glasses. Gives you a clear view of the brake pump's fluid consumption. 2. Rubber Sealing Ring: The O-ring is made of durable rubber, strong rebound, aging resistance, ensuring a good sealing effect. 3. Clear and Durable Lens: Resin lens with a better perspective effect, allowing for clearer observation of fluid usage; thickened and not easily deformed. 4. Widely Used: The sight glasses and rubber sealing ring assemblies are universal replacements for most motorcycles and ATVs. 5. Complete set: Comes with ten sets of brake pump oil sight glasses and O-rings, providing enough components for future replacements. Specifications: Item Type: Brake Master Cylinder Sight Glass Material: Rubber + Metal Fitment: Suitable for motorcycle, ATV, etc. Package List: Package includes 10 x Master Cylinder Sight Glass Lenses 10 x Sealing Rings