Ljuutx Bike Hydraulic Disc Brake Caliper Piston Kit - Compatible with Shimano M640 M810 M820 M7120 M8120 M9120 4-Piston Brakes | Perfect for Mountain Biking, Road Cycling & Bike Maintenance

Ffective heat insulation, heat-resistant deformation,DON'T WORRY ABOUT CHIPPING!FAN-SHAPED HEAT SINK DESIGN,which can reduce the contact area for heat transfer, increase air shuttle, and promote heat dissipation.DEEP CONCAVE DESIGN ON THE BACK TO CENTER THE THRUST.Compatible: ZEE BRAKE (M640 M810 M820 M7120 M8120 M9120)colour: blackMaterial: heat-resistant materialsPackage Contents:2 * Big Piston2 * Small pistonOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.