10-Pack Chemical-Resistant Polypropylene Stoppers, 14/23 Base Shape_Rectangular Carefully lagged nickel-plated copper 3

Carefully lagged nickel-plated copper 3 by 2-inch inner cup inside a 4 by 2

matching the geometry of companion copper and iron rods for controlled thermal-conductivity comparisons

with each feature labeled

this five-piece weight set bundles machined steel shafts from 50 to 1000 grams on a wooden storage block

sized for student work spanning single-cell and small-battery-stack voltages

10-Pack Chemical-Resistant Polypropylene Stoppers, 14/23 Base Shape_Rectangular Carefully lagged nickel-plated copper 3Pack of 10 lightweight polypropylene stoppers fits 14 23 joints for sealing ground joint vessels with chemical and impact resistance.