Glow in the Dark Dogs Balls: These glowing rubber balls for dogs the keep the game going even after the sun goes down; Your dog will love its bouncy, grip-able texture and you will love how easy to clean this Max Glow Dog Ball is.
 
Nighttime Fun: 5 minutes under any bright light generates 20 to 30 minutes of glowing playtime, no batteries or cords needed; Made with safe photoluminescent material, size medium Chuckit balls for dogs fit all medium Chuckit Launchers
 
Sizing matters: Size medium measures 2.5" in diameter and is best suited for dogs weighing 20-60lbs. Dog balls should be small enough for your dog to carry, but large enough that the ball can't completely fit in their mouth. When in doubt, buy a size up