Product Features
24/40 Joint;14/20 Joint;19/22 Joint
5 packs
Penny-Head stopper
Hollow glass stopper
Borosilicate Glass, Heavy Duty Design, Reusable & High quality
Product Options
XL-8154830
24/40: XL-815483
14/20:XL-815834
19/22:XL-815835
Usually Ship in 5 - 7 Business Days. Shipping may take longer than expected during COVID-19.
Finely made glass stoppers for the 24/40 taper, these are precision ground, symmetrical, and the glass is free of ripples or bubbles. And the price is right. Great for leaving a solution to rest for a few hours or overnight but not for more than a few days as the stoppers will eventually freeze.
I ordered Stonylab glass stoppers, but they don't have the Stonylab logo on the penny head. I am wondering if these are just some cheap counterfeit stoppers. I like Stonylab glassware and expect to receive the OEM version not some knockoff.<br>I don't know how to grade these other than they do look like glass stoppers.
Glass was good quality and provided a great seal for our 24/40 joints
They fit perfectly ??!! And got to me fast!!!!
Perfect, had gotten the distillation kit a while back, these work good to close it off from atmosphere
