Sand Timer Long Time Size:15mins The unique feature of this

The unique feature of this rack is that vials can be unscrewed without actually picking them up as the vial will lock in every well and hence will not twist

remember to clean it thoroughly after each use because residues could affect future results

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The 47mm size refers to the diameter of the fritted filter base

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Sand Timer Long Time Size:15mins The unique feature of thisThe Sand Timer Long Time is a must have for any experimental setup, whether in physics, chemistry, or environmental science. This serves as a precise timekeeper for motion experiments in physics, aids in maintaining precise reaction conditions in chemistry, and proves valuable in estimating particle settling rates in environmental science studies. This sturdy sand timer boasts molded end caps and thick wall surrounds for maximum durability. Perfect