Steel Ball Bearings, 3mm, 50-Pack Item Type_Mug 1 Henry air-core inductor on

1 Henry air-core inductor on a bobbin with 4mm sockets

Variety pack to help with experiment of contrasting resistances and temperature

providing a measurable projection surface for sizing real images formed by lenses and concave mirrors

the lower-resistance higher-current option in the compact-tube rheostat line

this insulated wire keeps polarity color-coded across the mid-distance between instruments and student-built bench circuits

Steel Ball Bearings, 3mm, 50-Pack Item Type_Mug 1 Henry air-core inductor onFifty pack of 3mm steel ball bearings, the smallest size in the series for pendulum and small scale collision experiments where a compact projectile mass is needed.