I recently bought a EHLE and it says the ideal size for the downstem is 10.5mm. My friend has a 12mm EHLE Diffy he said he would sell me for $5. Would it still work fine or should i just go buy one that fits perfectly?
Buy one that will fit well or you run the chance of cracking, and breaking also bring your pipe with you so you can get one thats long enough! You want it to stop right before the glass edge of the beaker without touching the edge!
