Open Top Cylindrical Dropping Funnel with Glass Key Stopcock, 250mL, Ungraduated, Borosilicate Glass Chemical_Fine White Sand Class A volumetric flask in

Class A volumetric flask in borosilicate glass holds 500mL with beaded rim for precision volumetric measurement and laboratory procedures

Very long-focal 75mm double-concave glass lens at 500mm focal length

Biodiesel production kit demonstrates green chemistry through transesterification reactions

the polysaccharide used as the iodine-clock-reaction indicator and as a complex-sugar source in biology labs

and lead threading onto string or rod for mass-dependent pendulum period comparisons

Open Top Cylindrical Dropping Funnel with Glass Key Stopcock, 250mL, Ungraduated, Borosilicate Glass Chemical_Fine White Sand Class A volumetric flask inOpen top cylindrical dropping funnel in borosilicate glass holds 250mL with glass key stopcock for controlled liquid addition procedures.