Beakers; Bubble levels; Distillation columns for laboratory use; Electrical voltage tester pens; Laboratory apparatus and instruments, namely, pre-packed columns for use in chemical synthesis; Laboratory filters; Laboratory pipettes; Measuring cups; Measuring glassware; Petri dishes; Radiation-measuring instruments; Reactors, coils, retorts and crackers for use in high temperature chemical reactions; Scientific measuring instruments, namely, conductivity meters; Test tubes