Protex Ultra Select Disc Rotor SDR12126 Ultra-Ceramic They are electronic devices used

They are electronic devices used to indicate how much material is left before disc pad replacement is required

filtered oil circulates around the motor

Anti drain-back valve preventing oil draining back out of the filter through the inlet holes

this precision-balanced rotor has a durable cast iron composition and multiple vane designs to suit different vehicles

Protex Ultra Select Disc Rotor SDR12126 Ultra-Ceramic They are electronic devices usedThe Protex Ultra Select range of disc rotors caters for a wide range of specialty vehicles, including performance and classic vehicles. Available in a variety of finishes and specifications, including drilled and slotted, in both standard and high carbon materials, this range tailors for those hard to find and less common applications.