... 4) Timing: 1-30 minutes Specifications of wooden sand timer 1. It has two connected vertical glass bulbs allowing ... 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 ... Also good gift for home or office decoration. 5. Color sand: blue, white, yellow, orange, purple…… 6. Individual handcraft ...