Plug Replacement 4mm 17/40 ,Each

Details:

Distilling head, vigreux, vacuum jacketed^ replacement components. Replacement 4mm 't'-bore glass plug. Jacketed fractionation distilling head for use under vacuum. The 10/18 top outer joint is for a 1in. Immersion thermometer while the 10/30 joints are for a 2in. Immersion thermometer.