4" Cast Iron Closed Ring Support Type_Celestial the standard low-end Ohm's-law value

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

sized for fine ductile materials including nylon

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

sized for demonstrating the inverse pressure-volume relationship of a gas at constant temperature

a low-cost option for introductory mechanical-advantage demonstrations

4" Cast Iron Closed Ring Support Type_Celestial the standard low-end Ohm's-law valueRugged 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.