Stackable Connecting Lead, Model X engine models and three cast iron support

and three cast iron support rings for ring-stand assemblies

this nickel-plated steel set covers a full C-major scale at scientific pitch (C4 = 256Hz) in a 6

the drilled aluminum ball gives a lightweight contrast to steel and brass balls of the same size in pendulum period and momentum-transfer demonstrations

Greatly magnified Paramecium model reveals cilia arrangement

5 inch Alnico horseshoe sits between the 1

Stackable Connecting Lead, Model X engine models and three cast iron supportUsed in high current circuits where exposed plug pins are not acceptable, this 4mm stackable safety lead carries up to 12A through nickel plated split hollow pins on both ends.