Item # 21020022This brake plate for the right rear birdcage is used on the Extreme 02, Kong, and all Grizz models.
Item # 21020025This retainer is used on the inside of the right rear birdcage for G9, G7, Kong, and Extreme 02 models.
Item # 21020042This retainer is used on the outside of the left rear birdcage and on the outside of the right rear G9, G7, and Kong models.
Item # 21020041This is the center plate for the versatile left rear Grizz birdcage; also used on the 02 and Kong models.