These double cannula tubes may be fenestrated or unfenestrated with a connector that fits with 15 mm ventilator tubing.
Source: wiktionary
Unfenestrated
/ʌnˈfɛnɪstɹeɪtɪd/
Synonyms for "unfenestrated"
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Sample sentences
2 total sentences available.
On the engineering diagrams the Pump Room's maybe about twenty meters directly beneath the centermost courts […] – an unfenestrated oval chamber with six man-sized curved ducts radiating up and out to exit points on the grounds above.
Source: wiktionary