This dropper assembly has a 20 SR 0.8 cc black rubber bulb, a black 18-415 polypropylene (P/P) continuous thread closure, and straight 7mm x 75mm glass pipette.
This dropper is a perfect fit for our 100ml Boston round glass bottles shown below under "Matching Products"; and is great for a wide variety of uses from aromatherapy and essential oils to vape juice.
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