±2.5mA DC Interchangeable Dial for Demonstration Meter Glass Sets & Apparatus_Organic Chemistry Sets Universal laboratory clamp holder with

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

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

Nine removable sections expose cortical hemispheres

supporting reproductive cell biology teaching

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

±2.5mA DC Interchangeable Dial for Demonstration Meter Glass Sets & Apparatus_Organic Chemistry Sets Universal laboratory clamp holder withPlus 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.