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These No. 2 rubber stoppers are 16-20 mm diameter with two 3 mm diameter holes.
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This product is sensitive to extreme heat and cold. To maintain its integrity, shipping options will be limited to one- or two-day methods to a physical address during certain times of year
DESCRIPTION
These No. 2 rubber stoppers are 16-20 mm diameter with two 5 mm diameter holes. Fits Extra Large Test Tubes.
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Learn MoreMy Science Perks is FREE! Just place your order while logged in to your Home Science Tools account and you'll automatically earn up to 6% back when your order ships!
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