VAGREEZ Sand Timers Are Your Premium Choice -- User Friendly Sand Timers: The toothbrush times are made by friendly high borosilicate glass and acrylic material. Each hourglass sand timer has a number of time mark. Durable Sand Clock for Kids: The timeout timer for kids is made of hard acrylic material and glass, which is shock resistant and kindly for use. Best Time Management Tool: The timeout timers help your kids do things more efficiently and have a strong sense of time. The hourglass timer can be used for cooking, games, classroom, study, tooth brushing, exercise. Notice: This egg timer for kids is not a precision timing device, so there is time deviation. Specification: Material: acrylic material, glass, sand<br> Size: 3.7''X1.7'''. Package: 1x 1 minute sand timer, 1x 2 minute hourglass sand timer, 1x 5 sand clock for kids,1x 15 minute timer for kid