±2.5mA DC Interchangeable Dial for Demonstration Meter Glass Sets & Apparatus_Organic Chemistry Sets using wide-pad threaded metal screws

using wide-pad threaded metal screws for secure fastening

Equipped with a flexible delivery tube and capped tip for better aim when rinsing glassware

Tirrill burner on a stable octagonal base adds air

Binaural stethoscope with PVC tubing provides clear heart and lung sound detection for medical and nursing education

±2.5mA DC Interchangeable Dial for Demonstration Meter Glass Sets & Apparatus_Organic Chemistry Sets using wide-pad threaded metal screwsPlus or minus 2. 5mA DC interchangeable scale on a 315x115mm laminated panel with integrated shunt, sized to drop into the demonstration meter and reconfigure it as a center zero ammeter.