I will check the volume graduations against a measuring cup and remark as necessary using an indelible “black Sharpie” since similar products are wildly inaccurate with both metric & USA standards.
I shall test the screw on discharge connection for water tightness, it seemed to tighten up nicely by hand with a firm final twist. The flexible corrugated discharge piping appears very thin walled and flimsy, but serviceable.
Intended use is for engine & hydraulic oil applications.