3Pcs/Set hourglass timers - 3 minutes, 5 minutes and 7 minutes, each with a different bright color of sand, easy to distinguish which timer to use. Shock Resistant Hourly Sand Timer - Made of durable, high quality borosilicate glass and non-toxic sand, not easy to break. Using these sandbox timers is more enjoyable and less distracting than watching your cell phone often, and helps you stay focused and efficient for a long time. Good Time Management Tool - Help your child to do things more effectively and develop a strong sense of time. Perfect for cooking, classroom use, game time, exercise timer (yoga or psychological training). Also be used as home office decoration. Good gifts for children and friends. Specification: Material: Glass and Wood Size: approx 9x3x9cm/ 3.54x1.18x3.54inch Package Includes: 1 Set Sandglass Timer Note: Due to the manual measurement, please allow 1-2mm differences in size. Due to the light and screen difference, the item's color may be slightly different from the pictures. Please understand.