Description
Double-concave glass lens at 3-inch diameter and 200mm diverging focal length
sized for physics force experiments and balance calibration in classroom laboratory sessions
Spare pack of ten low-mass pith balls sized for the standard pith-ball electroscope
Drops a dense object and a feather together inside a 20-inch evacuated glass tube
Plant and Animal Cell Comparison Model Included_Rod & Base Double-concave glass lens at 3-inchBuilt for cell structure comparison, this dual cell model pairs plant and animal cells side by side to highlight cell wall, chloroplast, and vacuolar differences.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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