4" Cast Iron Closed Ring Support Type_Celestial sized for repeated student use

sized for repeated student use on solid-core and stranded wire ahead of crocodile-clip and terminal-block work

the standard low-end Ohm's-law value used in current-limiting and voltage-divider work

a low-cost option for introductory mechanical-advantage demonstrations

this rotating magnet apparatus pairs a 600-turn solenoid with an Alnico magnet on a rotating platform to generate time-varying flux

One-meter single-wire potentiometer with 24 SWG constantan wire stretched along a millimeter scale

4" Cast Iron Closed Ring Support Type_Celestial sized for repeated student useRugged cast iron closed support ring with an integral screw clamp, combining a 4 inch inner diameter and a rod grip from 5 16 to 5 8 inch for holding wire gauze and vessels over heat.