Wooden Frame Abacus, 6 Steel Wires Chemistry_Molecular Model Sets and airway anatomy at scale

and airway anatomy at scale

Hinged V-section arms grip lenses and mirrors up to 75mm in diameter

this regulated low-voltage DC power pack outputs a fixed +12V through front-panel terminals on the benchtop

sized for energy-storage demonstrations where stored joules need to discharge through a visible load

this handle-fitted bicycle wheel lets students feel torque resistance in a spinning mass

Wooden Frame Abacus, 6 Steel Wires Chemistry_Molecular Model Sets and airway anatomy at scaleWooden frame abacus on a 13. 5 by 9. 5 inch finished base, six steel wires carrying 20 beads each for hands on instruction in counting, place value, and basic arithmetic.