4" Cast Iron Closed Ring Support Type_Celestial One-meter single-wire potentiometer with 24

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

designed for classroom identification drills and examination preparation

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

Hand-cranked simple motor model on a 5

a low-cost option for introductory mechanical-advantage demonstrations

4" Cast Iron Closed Ring Support Type_Celestial One-meter single-wire potentiometer with 24Rugged 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.