±2.5mA DC Interchangeable Dial for Demonstration Meter Glass Sets & Apparatus_Organic Chemistry Sets Nine removable sections expose cortical

Nine removable sections expose cortical hemispheres

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

Tirrill burner on a stable octagonal base adds air

Five-centimeter brass sphere mounted on an ebonite-insulated metal base

Universal laboratory clamp holder with dual 360-degree boss head rotation

±2.5mA DC Interchangeable Dial for Demonstration Meter Glass Sets & Apparatus_Organic Chemistry Sets Nine removable sections expose corticalPlus 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.