This Schumacher Racing Products factory replacement rear differential pulley set is designed for the Cat 2000 platform. The set includes a metal diff pulley gear and two white plastic flanged rings that seat against it as part of the rear differential assembly. This is the correct service part for hobbyists rebuilding or replacing worn drivetrain components in the rear diff unit. Features: Includes metal diff pulley and two plastic flanged rings Designed for rear differential assembly Factory Schumacher Racing Products replacement part 7/7/26 cs