Energy Tube, teaching resource for an array of scientific concepts: open and closed circuits, conductors vs. Insulators, light waves, sound waves,currents, and energy, When a conductor touches both of the electrodes on tube, tube emits a sound and flashing red/green/blue LED lights
Epoxy-coated, steel wire test tube rack resists most solvents, weak acids and bases, Withstands temperatures up to 121 degreeC, Holds 20 Tubes, size 20mm.
This Polystyrene Rack Fits Test Tubes Up To 6-Hole, 6-Pin, Are Excellent Space Savers And Can Act As An Extra Pair Of Hands In The Lab. There Are 6 Holes To Hold Tubes, As Well As 6 Pins For Letting The Tubes Dry, Size: 25Mm In Diameter
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