Solid Specific Gravity Bottle, 50mL, Borosilicate Glass cylinder sized as a self-contained module

sized as a self-contained module that lights up when current flows the right way for polarity-and-circuit lessons

gapped and continuous coil rings

Suspends a 20mm solid zinc cube from a spring scale for water-displacement density measurement

Snap-apart 2-inch ceramic bar magnets in a 10-pack

Greatly magnified HIV virion model separates into two parts exposing the outer envelope and interior capsid with RNA

Solid Specific Gravity Bottle, 50mL, Borosilicate Glass cylinder sized as a self-contained moduleSolid specific gravity bottle in borosilicate glass holds 50mL for precise density determination of solid samples in physics and chemistry.