50-Pack Assorted Solid Rubber Stoppers, Acid and Alkali Resistant Material_Cork sized for repeated student use

sized for repeated student use on solid-core and stranded wire ahead of crocodile-clip and terminal-block work

Right-angle cone to flexible tubing Rotaflow stopcock in borosilicate glass connects ground joint apparatus to rubber tubing with flow control

000 volts to demonstrate energy conversion

allowing a sodium or filament lamp to be aimed precisely onto a spectrometer slit or refraction-cell setup

50-Pack Assorted Solid Rubber Stoppers, Acid and Alkali Resistant Material_Cork sized for repeated student usePack of 50 solid rubber stoppers in assorted sizes provides acid and alkali resistance for comprehensive laboratory vessel sealing applications.