2Ω Resistance Coil Pack Size_14 this 4-inch carbon-steel needle pivots

this 4-inch carbon-steel needle pivots on a brass cup bearing for low-friction rotation under the local field

Two 250-turn coils of 0

supplying the third-color short-reach line in high-current 4mm-socket bench-circuit wiring

Heavy-duty cardboard storage carries this 4 x 1

supplying the plastic-coated counterpart to bare copper for circuit wiring where exposed conductor must be avoided

2Ω Resistance Coil Pack Size_14 this 4-inch carbon-steel needle pivotsTwo ohm reference coil non inductively wound from double silk covered constantan on a plastic rod, sealed inside a transparent tube with two terminals and plus or minus 1% precision.