Buchner Funnel Flask Adapter Set,Tapered Collar Green 8 sizes

Quite possibly one of the most useful auxiliary lab tools you can have, I will always have a set of these! Once you use it once for anything, 20 new ideal applications will come to mind!Dont get me wrong, there are still some fittings that can never be substituted for...but you will find that your work can more easily flow due to: 1) unique color makes them easy to spot. 2) stack together so you wont lose any of them and making for compact storage. 3) very easy to clean!

These stoppers are great for a multi-size fit. The do not keep as dry as a fully fitting stopper, but will still hold under a vacume. Make sure to put the end of your funnel clear of the stopper bottom to keep dry.

Needed different sizes of collars and this filled the need for having many all in one.

These will work fine but they have tons of small rubber bits hanging from the edges from molding. Seems like a little cleanup was warranted but ignored. I guess that explains the cheap price. "They pass the savings onto you!"

I use these to seal funnels in vacuum flasks during filtration of inks. They are sturdy, very flexible, and seal nicely, allowing me to reach full vacuum. In addition, they seem to be more resistant to staining than other adapters I use. I've only had them about a month so I can't comment on longevity, but I have used them a lot in that time and so far so good.

Good qualityEasy to cleanLow odor and powder coverPerfect solution

Works well

First, everything is as advertised. I found the size I needed, and everything was in brand-new condition. However, after 3 uses, the rubber split, making it useless. Maybe I wasn't handling it properly? Or maybe it was simply cheap material?I purchased a different solid rubber adapter from Amazon, and that one looks like the real deal. Only flaw is I have to use a step drill to make the size I need. I hope this info helps someone...