DescriptionDescriptionSpecification:Made from TPR material, these ball are safe to use.You can wash it with water when it becomes dirty.It is a very good pressure release appliance for office or home. It also can be used as a toy for fun.It can be stuck on ceilings for 3-20 seconds, and can be stuck on ordinary gypsum wall for 5-30 seconds. Luminous ball will glow in a dark environment.Item Name: Squeeze BallMaterial: TPRQuantity: 4Pcs/SetStyle:Noctilucent: Transparent + Green + Blue + Orange (Total 4Pcs)Solid Color: Red + Yellow + Blue + Green (Total 4Pcs)Features: Soft, Stress Relief, Squeeze, Round ShapeSuitable People: 3 Years Old and aboveDiameter: 6.5cm/2.56 (Approx.)Notes:Due to the light and screen setting difference, the items color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:4 x Squeeze Balls