Features: brand new and high quality Contact to make the film using premium high temperature insulation materials, can rely on 400 degrees Celsius heat, heat and reduce heat attenuation. Contact us if you have questions,we will try to serve for you. Suitable for road brake calipers or mountain bike slx xt for xtr. The deep concave design on the back can center the thrust. Unique strip groove design, reduce heat transfer contact area, increase shuttle airflow is conducive to heat dissipation. Package Includes: 1 Set x MTB Road Brake Caliper Piston. Specifications: Material: Ceramics Size: Diameter 21.9MM, Height 9MM For SLX series-M675 M7000 M7100 clamp For XT series-M785 M8000 M8100 clamp For XTR series-M9020 M9000 M9100 clamp For R7070 R8070 R9170 RS785 RS805 clamp note: Please allow 0-1cm error due to manual measurement. Make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!