Spectrum Tubes Deuterium, glass Tubes approximately 10-1/4in (260mm) long, central capillary portion approximately 3-1/2in to 4in (90-100mm) long with electrodes sealed at both ends and connected to lead wires protected by metal caps.
Test Tube, plain, with bakelite screw cap & rubber liner, Material: Made from high quality, heavy duty, Borosilicate Glass, Dimension: 150x18mm, capacity: 25ml, pack of 24