Sand Timer Hourglass ? 1. It has two connected vertical glass bulbs allowing a regulated trickle of material from the top to the bottom. Once the top bulb is empty, it can be inverted to being timing again. ? 2. Factors affecting the time include the amount of sand, the bulb size, the neck width, and the sand quality. ? 3. It is used when an approximate measure suffices, as in egg timers for cooking or for board games. ? 4. Also good gift for home or office decoration. ? ? 5. Color sand: blue, white, yellow, orange, purple…… ? 6. Individual handcraft, classic look, timing accurate ? 7. Measures: 9"H ? ?