[Vehicle Fitment]: Compatible with Scion xB 2008-2015---Rear Left, Driver Side. [Reference Number]: 4785012230, 19-B3423. [Specification]: Brake Piston Count: 1 Piston; Piston Size(OD): 1.507 inches; Inlet Port Size: M10 x 1.0; Bleeder Port Size: M10 x 1.0; The Brake Calipers are coated with antirust coating, which can effectively prolong the service life..
