Astm d2146, type i-11001; black
An item which by rising and descending within a gage tube indicates the level of a liquid in a reservoir.
NSN 5999-00-375-0180
NSN 5945-01-443-4022
NSN 5910-01-312-2206
NSN 5945-00-985-4440
NSN 5965-01-643-8016
NSN 5915-00-078-8561
NSN 5985-00-156-6651
NSN 5925-01-651-6310
NSN 6610-01-359-0008
NSN 5895-00-016-0699
NSN 5998-01-026-0311
NSN 6110-01-408-0314