Plant and Animal Cell Comparison Model Included_Rod & Base sized to keep electromagnetism demonstrations

sized to keep electromagnetism demonstrations running when the original coils wear out

and protein separation across three selectable ranges (0-50V

sized for physics force experiments and balance calibration in classroom laboratory sessions

Molded black plastic replacement knob sized for the goggle sanitizer cabinet timer switch

Double-concave glass lens at 3-inch diameter and 200mm diverging focal length

Plant and Animal Cell Comparison Model Included_Rod & Base sized to keep electromagnetism demonstrationsBuilt for cell structure comparison, this dual cell model pairs plant and animal cells side by side to highlight cell wall, chloroplast, and vacuolar differences.