This Hourglass Timer is made of ABS and glass. The sand glass is made of transparent glass and you can observe the clear mirror flowing sand. The color sand flows slowly and lasts for up to (1 minute, 3 minutes, 5 minutes, 10 minutes, 15 minutes, 30 minutes), sand color, logo custom is available. It is an ideal for any classroom activities, board games, competitions, and more.
