Shock- Resistance Sand Timers -High quality and protective cover allow sand glass timer not easy to be broken, very sturdy to use. 6pcs of different sand timer put in one package, each set of timer have white \/ blue \/ green\/ purple\/ orange\/ pink colors. Counting Time - 1 minute, 3minutes, 5minutes, 10minutes, 15minutes, 30minutes each one with 10% time deviation. Well Made - Sturdy PVC, high borosilicate glass and sand. Each Size: 3.71.6 inch. Will not break under normal usage conditions, but don't drop it off the high. Used widely - Ideal for Kitchen, Home, Classroom, Game, Exercising Timer. Can teach the children about time meaning with the visual angle. Perfect to decorate your home and office, great as a gift to children and friends. Kindly Notice - This is a sand timer made for games. It is not a precision timing device, so there is time deviation. In addition, please don't use anything to scratch the words on the glass to prevent the words drop off.