Large sand timers with moulded end caps and thick surrounding walls. For easy identification each timer is colour coded. Perfect for use in games and timing experiments. Each colour represents a different timer. Red-1 minute, Pink-2 minutes, Yellow-3 minutes, Blue-5 min utes, Green-10 minutes. Size 16cm x 7cm. The Blue-5 minute timer is also available as a Jumbo Sandtimer - measuring 30cm x 15cm.