Product specifications: Packing: 1* piston、1*sealing ring（You need to buy two for one caliper.） Piston size: OD21.9*8.8H Piston weight:4g Material: Phenolic + patented special synthetic material Color: Black Compatibility: Shimano SLX (M675 M7000M7100), XT (M785 M8000 M8100), XTR (M9020 M9000 M9100) and road bike calipers such as R7070 R8070 R9170 RS785 RS805 Please confirm your calipers model before purchasing! Professional installation and usage precautions: 1、It is recommended to install under the guidance of professional technicians.Avoid oil leakage and other problems caused by damage to the seal ring due to improper operation and installation. 2、The piston needs to be pushed in vertically, If the resistance is too large, shake the piston and push it in slowly for avoiding violent knocking to damage the seal ring 3、It is recommended to use the original mineral brake oil (mixing other brake oils may cause the seal ring to expand and get stuck) 4、When installing the piston, it needs to be squeezed vertically into the clamper, if it feels particularly strenuous, do not apply excessive pressure.You need to take it out and align it and then squeeze it in manually again, Avoid damaging the piston seal ring and causing oil leakage
