OR Logic Gate, 2-Input Pack Size_7 Teaches proper brushing technique through

Teaches proper brushing technique through a 3x life-size jaw model with gums and oversized toothbrush

and 12 volts on this 2-amp battery eliminator power supply

Pack of 10 Stoddard test tube clamps in stainless steel with finger grip securely holds test tubes during heating

anchoring retort stands and apparatus to the edge of a classroom workbench

5 inches thick

OR Logic Gate, 2-Input Pack Size_7 Teaches proper brushing technique throughLED indicating 2 input OR gate module showing HI and LO states with red and green LEDs and a printed truth table on the board, verifying the Boolean disjunction operation by direct observation.