500mm Connecting Lead with Crocodile Clips Both Ends, Red, 4mm Plug Features_Spout Two-speed ticker timer kit printing

Two-speed ticker timer kit printing 25 or 40 dots per second on paper tape via carbon discs

Life-size digestive system model in two parts reveals the esophagus-to-rectum path with stomach

and herbivore feeding adaptations for teaching

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

500mm Connecting Lead with Crocodile Clips Both Ends, Red, 4mm Plug Features_Spout Two-speed ticker timer kit printingUsed 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.