40mm tournament grade. They are super bright and great for nighttime ping pong and beer pong games. The balls can be resued endless amount of times just a quick exposure to light and they are ready to glow.
Need continuous glow? They react perfectly (always glowing) when exposed to a black light.
These Balls are blue in color when not glowing, when glowing they will glow aqua. Balls are packed in poly bags , non retail packaging .