500mm Connecting Lead with Crocodile Clips Both Ends, Red, 4mm Plug Features_Spout Turning the hand crank walks

Turning the hand crank walks students through every stage of the 2-stroke gasoline firing cycle on a 14-inch model

Food-grade peroxide test strips in a 50-strip vial calibrated for the 3 to 10 percent concentration range

showing how cam profiles convert rotation into timed linear or oscillatory follower motion

Hand-crank centrifuge spins four 15mL tubes for teaching sedimentation

500mm Connecting Lead with Crocodile Clips Both Ends, Red, 4mm Plug Features_Spout Turning the hand crank walksUsed as the positive rail partner to the 500mm black lead, this red insulated wire with crocodile clips at both ends keeps polarity color coded across longer student bench setups.