Narrow Neck Reagent Bottle with Glass Stopper, 500mL, Soda Glass Light & Optics_Color Pairs equilateral 48 by 48mm

Pairs equilateral 48 by 48mm shape with extra-dense flint glass at refractive index 1

Liquid propane Bunsen burner adds a flame stabilizer and adjustable air vent for consistent

letting students quantify expansion coefficients side by side

and wavelength experiments

passing freely through the ring at room temperature but halted by the ring after flame heating expands the metal

Narrow Neck Reagent Bottle with Glass Stopper, 500mL, Soda Glass Light & Optics_Color Pairs equilateral 48 by 48mmNarrow neck reagent bottle in transparent soda glass holds 500mL with tight fitting glass stopper for chemical storage and handling procedures.