Premium Demonstration Dynamo with Hand Driver Type_Round End and tin cylinders for matched-volume

and tin cylinders for matched-volume mass and density studies

plus a 22 gauge copper-nickel

packaged with a keeper that bridges the poles to keep the field intact between sessions

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

90mm 3-element uni-focal lens

Premium Demonstration Dynamo with Hand Driver Type_Round End and tin cylinders for matched-volumeHand 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.