Enjoy a game of fetch with your pooch long after dark with these fantastic glow in the dark pet balls! Made from durable pet friendly plastic, these bright neon balls come in neon pink, yellow or green making them easy to see in the daylight, and better still, they glow in the dark too! Perfect for play after dark, these LARGE glow balls don\'t need any batteries, simply allow them to charge in the light, before playing in the dark. Measuring 9cm diameter(tennis balls are 6.8cm diameter), these neon balls are just the right size for big dogs. Large Size - 9cm diameter (tennis balls are 6.8cm diameter)Available in neon pink, green or yellow (please note that colour will be chosen at random unless specified at checkout)Glow in the dark!For best effects use the UV torch above! or allow balls to charge in the light before viewing in pitch black conditions Sturdy, pet friendly plastic No batteries required