19/22 US Joint Plain Short, Medium and Medium+ 45˚ Stems

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With this Plain 420EDC glass sourced from Schott Glass is not designed for use with our TopHat system.  You'll want to provide your own screen or filter when using these stems.  

All sizes 

Short Stem ≈ 68mm 

Medium Stem ≈ 100mm

* Not compatible with our TopHat SubChamber