RS-S-1H-2H-1LB Stoppers Rubber, Assorted Solid, 1, and 2 Hole, 1 lb., Pack of 38

Good product fast shipping

Purchased for a Physics lab at our homeschool co-op. The stoppers fit into standard openings on the glassware which is appreciated. Also were able to be removed fairly easily, which is also a need!Only thing to improve would be if the hole in the stopper was a little larger so a standard science thermometer would better fit in there. Had to add some lubricant to get thermometer in and out.

I used these to find out the size of some bottles, and to use in a home-brew auto-beer-bottling rig. All of the sizes allowed me to figure out just about every bottle size I had, but these things are super stinky, they smell kinda like fresh asphalt.

Excellent product fast shipping VERY HAPPY

good

They product came as described. The variety and sizes worked for me. Was very disappointed to read the label on the bag that indicated the product "may expose you to benzene and lead". This is nowhere in the Amazon add that indicates what they are made of or what they are appropriate to be used for.I purchased these for home brewing use. I still can't figure out what they are actually made from. The warning on the bag seems to be the California standard warning, but I'd rather not contaminate my wine/beer with an unknown material.

They are what they are, work 👍.

Seemed like a good price but remember you get what you pay for. Holes are tiny and stoppers still have rubber attached showing they were cut out maybe. Quality of made in china?