Lamp Holder Demonstration Board Subcategory_Power Supplies supplying enclosed-wiper variable resistance for

supplying enclosed-wiper variable resistance for student safety

Corrosion-resistant nickel plating extends the service life of this butane or propane Bunsen burner for durable bench heating in chemistry labs

providing a stable heating platform for introductory chemistry and general science classroom work

5-inch glassware

Jointed Liebig condenser in borosilicate glass measures 40cm with 29/32 glass connectors for large-scale distillation and reflux procedures

Lamp Holder Demonstration Board Subcategory_Power Supplies supplying enclosed-wiper variable resistance forMES bulb in a holder mounted on a demonstration base with 4mm plug connections, supplying a 4. 5V 0. 3A load that lights up to confirm circuit completion in series and parallel demos.