6 PACKS HOURGLASS TIMER - 1 minute, 3 minutes, 5 minutes, 10 minutes,15 minutes,30 minutes. Each one has different bright color sand, easy to distinguish which timer for which usage. Size: 3.7''X1.7'', weight: 2.6ozSHOCK-RESISTANCE HOURGALSS SAND TIMER - Made of PVC, high quality borosilicate glass and non-toxic sand, uneasy to break. Using these sand timers can be much more pleasant and less distracting than looking at your phone to time, help you stay focused and productive for longerGREAT TIME MANAGEMENT TOOL - Help your kids do things more efficiently and develop a strong sense of time. Ideal for cooking, classroom use, game time, exercising timer (yoga or psychological training). Also can be used as home office decoration.NOTICE - This sand timer is not a precision timing device, there is 10% time deviation. Please don't use anything to scratch the words on the glass to prevent the words drop off. Under adult supervision when little child under 3 years old use the timersTeach Responsibility & FocusGreat for parents/teachers to help children understand time limits (e.g. homework, screen time). Encourages self - discipline and focus in a fun, stress - free way. A tool for learning and lifestyle.