Interchangeable Dial for Demonstration Meter, Model H Health & Genetics_Equipment & Supplies this six-lens glass set covers

this six-lens glass set covers double convex

letting students read image height and position directly off the projected real image during focal-length investigations

25-inch aluminum tuning fork features a round stem that grips firmly without damping the vibration

sized to fit tight laboratory frames while carrying heavy loads

Interchangeable Dial for Demonstration Meter, Model H Health & Genetics_Equipment & Supplies this six-lens glass set coversFive hundred milliamp DC scale on a 315x115mm laminated panel with sealed shunt, sized to reconfigure the demonstration meter as a 0 500mA ammeter for general purpose student bench work.