You should be able to get this from lab glassware suppliers, locally, such as VWR, Carl Roth, Huberlab etc. Should write them an email because it may not necessary appear in online catalogue.
Otherwise there is China. Many suppliers there, such as Lab1st.
Or as suggested above, local glass blowers. This is the nicest solution.
Okay, I’ve found who can weld the glass stopper. One more thing or a suggestion for a diaphragm pump capable of being effective for pumping about 20 grams of concentrate into the 50ml flask?
First learning test, this is my setup, 50ml boiling flask with about 15 grams of bho concentrate, Chinese mantle, china distillation head dry run, 9 cfm 1hp two stage rotary vane pump. No right pressure gauge to avoid any leaks, despite this my condenser and the receiving balloon are always dry, what suggestion do you give me?
I know perfectly well that the temperature is too high, I went to this temperature to try to understand if the fault is the pump, the material to be distilled or the distillation head? The pump gives it about 17 or 12 microns.
The probe is inserted between the mantle and the balloon