Specifications:Perfect replacement of the original ceramic piston.Applicable for Shimano M675/M785/M8000 hydraulic brake.Contact to make the film using high temperature insulation materials, can rely on heat 300 degrees Celsius, heat and reduce the heat attenuation.Surface four groove air hole design, can reduce the heat transfer contact area, increase the air shuttle, which will help to heat.The back of the depression design, the oil thrust concentrated in the central, so that the piston and the ring concentric activities.Smooth degree of durability, brake force, good sealing. Item Name: Hydraulic Brake PistonMaterial: MetalNotes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Package Includes:1 x Hydraulic Brake Piston1 x Sealing Ring