SI Manufacturing 30s - 1m - 3m - 5m and 10m Sand Timers - 16 cm x 6.9 cm - Set of 5

Durable sand timers with molded end caps, thick wall surrounds, and glass centres. For easy identification each timer is colour-coded. Perfect for use in games, accurate event timing and experiments. 16 x 6.9cm. Includes 30s, 1m, 3m, 5m and 10m timers. Grades K +.