Steel base
polymer/organic compound
compatible with SHIMANO: XTR BR-M9120, XT BR-M8020, SAINT BR-M820, SAINT BR-M810
ZEE BR-M640, BR-MT520
TRP: Quadiem, Quadiem SL, Slate T4
TEKTRO: HD-M750, HD-M745, HD-M735, HD-E725
weight of 1 pair with spring: 24 g