Manometer, compound pressure and vacuum gauge. It used to measure the pressure in refrigerant systems, refrigeration systems, oil systems.
STL (Stereolithography, filesize: 2.71 MB), MAX (Autodesk 3ds Max, filesize: 5.64 MB), STP (STEP, filesize: 960 KB), IGE (IGES, filesize: 2.67 MB), SLDPRT (SolidWorks, filesize: 1.11 MB)