It was already pinched in when i procured it. But like I said any glass blower could heat it up and pinch 3 or 4 points in to hold a screen. Or with some ingenuity you could shape a screen into a plug that goes in the bottom hole on the male ground end and push it up with a reasonable diameter...
So through my years of being in the chemistry lab I have collected a few pieces of glassware. I have had this Inner member joint with 24/40 glass on glass fitting that had been modified into a drying tube by pinching it on four sides equidistant. Here comes the point. I have been using this as...
