12" Connecting Lead with Alligator Clip and 4mm Plug, Black Science at Home_Chemical Science this insulated lead pairs a

this insulated lead pairs a 4mm banana plug at one end with a crocodile clip at the other for flexible patch wiring

paired with the 750mm black lead to keep wiring color-coded across mid-distance bench setups

Square-topped wooden screw simple-machine model with a leverage block

2mL graduations

this 80mm steel needle in a 6mm rod doubles as a precise alignment reference for image-formation and ray-tracing setups

12" Connecting Lead with Alligator Clip and 4mm Plug, Black Science at Home_Chemical Science this insulated lead pairs aPlug to clip 12 inch black lead combining a 4mm banana plug at one end with an alligator clip at the other, bridging instrument panels to bare wire components without rewiring.