US$ 49.00
Copper-wound maximum flux coil with 200 turns at a 45 mm internal diameter
Vertical 1
Five-inch demonstration compass with a 4-inch magnetic needle and a printed compass map
25 inch ceramic bar pair simplify pole identification
and herbivore feeding adaptations for teaching
Small Student Anemometer Meters_Electrical Copper-wound maximum flux coil withCorrosion resistant and sized for hand held use, this small anemometer measures wind speed during earth science fieldwork and classroom weather investigations.
US$ 49.00
US$ 39.00
US$ 29.00
US$ 40.00
US$ 29.93