Found 2 3D-models for “18mm downstem” across many websites

#420#weed#tobacco#bubbler#18mm downstem#jar lid#downstem#waterpipe#jar#glass jar
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Water Bong, threaded 14mm downstem

Water Bong, threaded 14mm downstem

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JarJarBongTop -- Water Pipe Mason Jar Top

JarJarBongTop -- Water Pipe Mason Jar Top

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