500mm Connecting Lead with Crocodile Clips Both Ends, Red, 4mm Plug Pack Size_15 mounted on a 5-inch stainless

mounted on a 5-inch stainless steel rod with nontoxic powder-coated zinc alloy

a battery-free source of partial vacuum for bell-jar demonstrations without external power

the drilled aluminum ball gives a lightweight contrast to steel and brass balls of the same size in pendulum period and momentum-transfer demonstrations

25 inch ceramic bar pair simplify pole identification

500mm Connecting Lead with Crocodile Clips Both Ends, Red, 4mm Plug Pack Size_15 mounted on a 5-inch stainlessUsed 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.