Closed Retort Ring with Stem, 3" ID, Plated Mild Steel Grade_Food Grade this silk square gives friction

this silk square gives friction rods a strong positive charge for triboelectric and electrostatic demonstrations

sized for stringing through small pulley systems or hanging pendulum bobs across multiple demonstration setups

Demonstrates that charge resides only on the outer surface of a conductor by inverting the charged net inside out and showing the charge transferring to the new outside layer

Safety-plug 150mm black 4mm-stackable lead rated to 12A with shrouded contact pins

designed to slot onto the demountable U-core and combine with other coil ratios for electromagnetic induction demonstrations

Closed Retort Ring with Stem, 3" ID, Plated Mild Steel Grade_Food Grade this silk square gives frictionThree inch inner diameter supports beakers and funnels on this plated mild steel closed retort ring, fitted with a 5. 5 inch stem for mounting on a standard retort stand.