US$ 19.00
75 inch inner
Five-pulley set of tandem low-friction plastic pulleys at 25
and ad-hoc experimental setups
Wider 70 x 20 x 8mm cross-section on this Alnico bar pair gives a broader pole face than typical bar magnets
Wooden wheel-and-axle simple-machine model on a 9
Alnico Cylindrical Magnet, 37 x 9mm Material_Copper 75 inch innerPink dots mark opposing poles on this 37 x 9mm Alnico cylinder pair, supplied with steel keepers and a cardboard storage box for sustained field strength between hands on experiments.
US$ 19.00
US$ 45.00
US$ 99.00
US$ 210.93
US$ 224.50
US$ 44.99
US$ 139.50
US$ 15.00