Force Pump Demonstration Apparatus Glassware_Glass Bottles Plastic MES bulb holder with

Plastic MES bulb holder with mounting tabs and screw terminals

Tangent-galvanometer instrument that derives current absolutely from compass-needle deflection against Earth's horizontal field

retaining magnetic strength through repeated handling and storage cycles

sized so that students can compare its uniform-curvature surface charge against sphere and cone partners in the conductor set

this replacement key matches the goggle sanitizer cabinet lock for classroom stockroom maintenance

Force Pump Demonstration Apparatus Glassware_Glass Bottles Plastic MES bulb holder withBorosilicate glass force pump model with transparent walls revealing the valve and piston action, demonstrating how positive displacement drives fluid against gravity.