250Ω Fixed Resistor Demonstrator with 4mm Terminals Biology_Entomology & Zoology the longer body extending the

the longer body extending the working face wide enough that iron-filing patterns are visible from the back of the room

while the cast iron anti-tip base keeps the unit upright on classroom benches

75 x 1 inches each

these concavity microscope slides hold liquid samples for hanging-drop preparations and observation of specimens in suspension

and inner components

250Ω Fixed Resistor Demonstrator with 4mm Terminals Biology_Entomology & Zoology the longer body extending theTwo hundred fifty ohm 5W fixed resistor in an ABS module with 4mm sockets, sized to fill the gap between 100 ohm and 1k values for fine grained voltage divider investigations.