Chuckit Phosphorescent Frisbee for Dog This frisbee is made from a high quality, chemically and biologically inert luminescent material Frisbee with a diameter of 23.5 cm Extend fetch time to early mornings and late nights with LIGHTPLAY fetch toys. Charge under bright light 5 to 10 minutes for 20 to 30 minutes of high-visibility lighted play. Recharge in seconds with a bright flashlight. Fast charging MAX GLOW rubber EVA foam and 2100 denier polyester construction. Glow in the dark 3D print on fabric and glow in the dark rubber ring on the bottom helps you and your dog find the flyer no matter what side it lands on. Designed to gradually descend during flight; floats. MAX GLOW products are made with a safe high quality photo luminescent material that is both chemically and biologically inert.