Feature 1、Function: A perfect replacement for your old brake master cylinder sight glasses. Gives you a clear view of the oil usage of the brake pump. 2、Rubber Seal Ring: O ring is made of durable rubber, strong rebound, aging resistance, ensuring good sealing effect and leakproof. 3、Clear and Durable Lens: Resin lens with a better perspective effect, more clearly observe oil usage, thickened, not easy to deformation. 4、Widely Used: Sight glasses and rubber sealing rings sets are universal replacements for most motorcycles and ATVs. 5、Comprehensive Package: Comes with ten sets of brake pump oil sight glasses and O rings, offering enough components for future replacements. Item Type: Brake Master Cylinder Sight Glass Material: Rubber + Metal Fitment: Fit for Motorcycle ATV etc. Package List 10 x Master Cylinder Sight Glass Lens 10 x Sealing Rings Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-dadangjia