±2.5mA DC Interchangeable Dial for Demonstration Meter Glass Sets & Apparatus_Organic Chemistry Sets Tirrill burner on a stable

Tirrill burner on a stable octagonal base adds air

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

Wooden fulcrum-balance simple-machine model with a sliding pivot

this magnified animal cell model reveals organelle ultrastructure and cellular organization for advanced biology instruction

±2.5mA DC Interchangeable Dial for Demonstration Meter Glass Sets & Apparatus_Organic Chemistry Sets Tirrill burner on a stablePlus 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.