KS CRUXi Air Pressure Cartridge 27.2 100mm Model=Deore FC M6000 Crankset Color Red Ring Position Type Chain Color Red Ring Position Type Chain Retaining Single Ring Tooth Count 30 Drivetrain Speeds 9 Drivetrain Speeds 10 Drivetrain Speeds 11 Drivetrain Speeds 12 Chainring BCD 104 Material Aluminum Defined Color Red Color Black Ring Position Type Inner Ring Position Type Outer Tooth Count 26 Tooth Count 36 Drivetrain Speeds 11 Chainring BCD 104 Chainring BCD 64 Material Aluminum Defined Color Black These are also called "Oil Pressure Sticks" and "Air Pressure Sticks" In KS Service Documentation Cartridges fully replace the functional mechanism of KS dropper posts