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Title: useless as a timer
Review: Not a useful timer. I followed another users suggestion to glue glass vials in place. They just pop into glued rubber grommets on frame. That was moot. The reason why this is useless is the five minute vial which is what I needed, gets clogged. The center must be too skinny for the colored sand. Sometimes it flows ok, other times it clogs. Tapping frame is not sufficient to get it moving.
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