Class B Beaded Rim Volumetric Flask, 25mL, Single Graduation, Borosilicate Glass Lab Equipment_Lab Burners 6A with constantan winding on

6A with constantan winding on a 300x44mm vitreous-enameled tube and a slide-bar carriage carrying a phosphor-bronze contact

offered as a safer substitute for the lead-containing PH0112FCB set

Holds 50mm-diameter lenses upright on a free-standing wooden base

Educational variant of the 4

dropping into the Worcester Circuit Board Kit for telegraph work

Class B Beaded Rim Volumetric Flask, 25mL, Single Graduation, Borosilicate Glass Lab Equipment_Lab Burners 6A with constantan winding onClass B volumetric flask in borosilicate 3. 3 glass holds 25mL with beaded rim and single graduation for general purpose volumetric measurement.