Usage Tips:Product Usage: This Brake Lever Brake Piston is designed to repair oil seepage and leakage caused by piston wear in MT2, MT4, MT5, MT6, MT7, and MT8 brake systems. Please confirm your bike model before purchase. Quality Material: Bike Disc Brake Accessory is made of aluminum alloy material that ensures longevity and resistance to wear. Product Dimensions: The piston has a diameter of 10mm and a total length of 24.3mm, making it suitable for most brake systems. It makes you rides more smoothly. Easy Installation: The Aluminum Alloy Disc Brake Oil Sealing Repair Part is designed for easy installation into your brake system without the need for professional help. Package Contents: Each package contains 1 set of Bicycle Brake Lever Piston for your convenience. Specification: Material: Aluminum alloy Diameter 10MM/0.39inch, total length 24.3MM/0.96inch Package Includes: 1 SetBicycle Brake Disc Lever Piston Repair Part Note: 1. Please allow slightly error due to manual measurement.2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!3. Wish you a wonderful on-line shopping!