1-5000Ω Plug-Type Brass Resistance Box Subcategory_Geology Models Five-pack of 3/4-inch plastic marbles

Five-pack of 3/4-inch plastic marbles

Pink-dotted ends and steel keepers across this 50 x 12mm Alnico cylinder pair simplify pole identification while the keepers preserve field strength during cardboard-box storage

3" (85mm) and an outer diameter of 3

Six tappable coil counts (100

portable enough for mobile demonstrations of current-driven magnetic field strength

1-5000Ω Plug-Type Brass Resistance Box Subcategory_Geology Models Five-pack of 3/4-inch plastic marblesPlug type resistance box covering 1 ohm to 5000 ohms with 11,110 ohms total at plus or minus 0. 1% accuracy on double silk covered constantan coils, the wider range Wheatstone bridge reference.