Premium Demonstration Dynamo with Hand Driver Type_Round End plus a 22 gauge copper-nickel

plus a 22 gauge copper-nickel

Clear magnifier lid on this round viewer captures and enlarges small insects or specimens for elementary and middle school entomology observation

and strike-slip faults with clearly distinguished hanging-wall and footwall blocks for structural-geology lessons

90mm 3-element uni-focal lens

All-glass water still producing distilled water for laboratory use through a contamination-free path that eliminates metallic leaching from internal surfaces

Premium Demonstration Dynamo with Hand Driver Type_Round End plus a 22 gauge copper-nickelHand driven dynamo on an 8x5 inch base with a 125mm pulley belt coupled to the dynamo and 4mm output sockets, with an LED indicator and reversible operation as a 6 8V DC motor.