1. and Safe Hourglass: Made of high-quality PVC and borosilicate glass, with a protective cover, ensuring durability and for long-term use. Our plastic sand timer 15 minutes exceeds the industry standard by ?��10%, ensuring accurate timing for all your needs. 2.Small and Hourglass Timer for Kids: The size of the hour glass timer is 3.70.7 inch, which is designed to be compact and easy to carry, making them ideal for children to use. 3.Sand Clock Management Tool: Helps with classroom activities, game time, studying and cooking. This sand watch 15 min is for timing purposes only, not suitable for precise time keeping. 4.15 Minute Sand Timer: The hourglass sand is purple and it has a clear script, making it simple to tell them apart.