This 1/2 oz. clear Boston round glass bottle comes with a handy black glass dropper. The clear glass displays the content accurately and the glass dropper perfectly seals the bottle to ensure the purity of the liquids inside.
This bottle is heavily used in the fields of medicine and cosmetics.
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Closure sizes are expressed using two different numbers.
For example, a closure size of (20/400) has a diameter of 20 mm and fits a bottle with a 400 GPI thread finish.
Some neck sizes are interchangeable. For instance, a 20/410 closure will usually fit on a 20/400 bottle. Also, 410 and 415 are usually interchangeable if the closure is not tamper evident.