Thick Glass Graduated Measuring Cylinder Set 5ml 10ml 50ml 100ml Glass with Two Brushes

At first I though I wouldn't like or use them much as planned. I thought for the most part they are just to small. I was wrong. I am happy I picked these. I use them for simple things like lowering the strength of a few solutions I use and for mixing small amounts of full-strength solutions. They are very handy for what I need and something larger wouldn't be as helpful. I would order these again if I would need to replace them. I may order a second set just for when I'm trying to multitask. I find this to be a good value. I have not had any of them fall over even after being a clutz and bumping into them. I will say give them a try and then make up your mind yourself. I think you will be happy with them.

Nice packaging, thick glass, better than advertised accuracy, includes brushes.That being said, I don't want to suggest that these are the equal of a well recognized brand's "Class A" cylinders costing several (maybe 10?) times as much. I can't make a comparison with a "nice" cylinder, but I would expect that a name brand product would have better QC. The markings on my set are less sharp and crisp on some cylinders than others. This is not glaringly obvious, but it reveals the manufacturing conditions required to meet the very reasonable price point. Aside from that though, I took multiple measurements with each cylinder, checking the mass of distilled water at 20C to 5 significant figures on calibrated equipment and found mine accurate to within about half of the indicated error or better. The precision was even better, suggesting that the markings are well matched to precisely made tubes. My 100mL delivers about 0.45mL+/-0.2mL more than indicated. The 50mL and 10mL give consistently about -0.2mL and -0.1mL respectively. That's pretty good I think. If I needed more accuracy I think I would go by mass instead of volume anyway.One note, these are marked EX (same as TD). These markings mean that the measured amount will be delivered when poured out, not that the cylinder contains the measured amount. The little bit left after pouring is supposed to be take into consideration, which is what you want for this type of cylinder.

Pretty dang good for the price. You can tell it's cheaper glass, there are some abnormalities in it, but it doesn't seem to affect the measurements. Everything looked good. Even the droppers are glass, two of them are very thin but the third is very sturdy. Everything is easy to read. Comes with two cleaning brushes (I assume that's what they're for). One minor cause for concern is it came labeled MADE IN CHINA and when I opened the box all the glass and accessories were covered in a white powder. Nothing like getting science instruments covered in mystery powder. Thought about snorting a line. Not sure what that is, but I assume It's probably just something from the manufacturing process or perhaps to like talcum to keep the glass from rubbing together in shipping. I don't know. Hopefully I didn't just get a face full of research chemicals.Overall, great buy. Would recommend.

The cylinders are great, pretty pleased with them; everything arrived intact, the cylinders are thick and strong, they hold up to rapid temperature shifts that soda lime glass likely wouldn't, they appear to be made of good ~33 borosilicate, and the graduation marks at least as accurate as I need. I've used them nine out of nine days since I received them, with quite a few different organic solvents and strong acids and for measuring chemicals across a reasonably wide temperature range (roughly 290°K to 400°K). Thus far all have held up flawlessly, no etching after holding tech+ grade H2S04 or HCl for long periods, and the graduation marks remain intact. Great deal for so cheap, 20+ years ago I'd be paying several times as much for just one of the 50 or 100ml cylinders, when I could even find stuff like this in town.The fact that I can just buy a brand new büchner funnel of virtually any type for like $10-50, or grahams/liebigs/flasks/stands/so much more, and have them arrive today or tomorrow, is just mindblowing. I guess "they" haven't made home/small lab chemistry involving only licit compounds illegal, yet!The droppers are junk though, particularly the graduated dropper which is completely unusable out of the box. The bulb is so loose it just falls off when you invert it, but the glass itself has a notch that made it compatible with another dropper bulb I had around. I can't pull a whole cc now but oh well, perhaps at some point I'll seal the original bulb back on somehow. I docked a point just for the awful pipettes... I don't need more pipettes but I'm sure some people purchasing this kit will, and I did sorta expect the graduated pipette to at least be functional out of the box, without having to sub in parts or have it fall apart and break the first time I try to use it, which definitely would have happened if I had tried to pick it up by the original bulb.

Naturally, unpacking my package on the front porch (thanks, COVID), I dropped the one interior box with breakables ... these cylinders. No problem, turns out. They're ridiculously well packed. I have no idea how somebody'd wind up with broken ones, save a good stomping.They're not 25-35 bucks per cylinder chem-lab stuff (they sort-of clink, rather than clunk, if you get my glassware drift), but you didn't fork out a Benjamin for these, didja? Nope. They're a great deal. If I do break one of these, I'll be back here to pick up another set.I have not, to be fair, checked them for accuracy (via a scale, and some 20 degree water or what have you), but guessing they're close enough. I'll come back to kvetch about it if not, but others here seem happy enough.I've wanted these for some time; glad I pulled the trigger.

This item was shipped so fast it seemed like I barely closed my laptop and it was on my doorstep! The glass measuring cylinders were very well packaged and suffered no damage during shipping. I am very pleased with this order