Chuckit! Medium Evader Dog Ball Random action Ideal for short-game play in backyards or other small spaces Use with Chuckit!, Chuckit! Jr., Chuckit! Ultra, Chuckit! Pocket, Chuckit! 18M, and Chuckit! 25M Ball Launchers Natural rubber Random action Ideal for short-game play in backyards or other small spaces Natural rubber Fits all Medium Chuckit! Ball Launchers Use with Chuckit! Ultra, Chuckit! Pocket, 18M and 25M Ball Launchers