US$ 53.99
this six-metal density cube set of brass
and S-wave vs P-wave behavior
Rat dissection model demonstrates rodent anatomy
and engraved index line for reference alignment
a range box
AND Logic Gate, 2-Input Geology_Geology Charts & Models this six-metal density cube setLED indicating 2 input AND gate module showing HI and LO states with red and green LEDs and a printed truth table, letting students verify Boolean conjunction by direct observation.