Economy Electricity Kit for Introductory Electronics Subcategory_Lab Equipment Sets and yellow leads are already

and yellow leads are already in use

Acrylic bell-in-vacuum jar with an internal 4-6V DC electric bell that fades and falls silent as the enclosed air is removed

Borosilicate crown glass prism with refractive index 1

Autoclavable polypropylene test tube stand holding six 25-mm tubes with six drying pins on the back

Economy Electricity Kit for Introductory Electronics Subcategory_Lab Equipment Sets and yellow leads are alreadyPlastic cased introductory electronics kit with 10 lamp holders+bulbs, a 6V buzzer, 3 6V motor, 5 DPDT slide switches, a cell holder, and 10 crocodile leads for full class circuit building work.