10x75mm Test Tubes with Cork Stoppers and Cardboard Rack, Borosilicate Glass, 3ml, Karter Scientific 220B6 (Pack of 25)
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Simply shift your decimal point to the left to convert a centimeter to millimeters. br>The dimensions of 16 x 150 mm are 1. 6 x 15 cm
This tube has a 13mm outside diameter. In a 22mm rack, it will be a very tight fit.
about 4. A hundredth of a millimeter equals three millimeters. 9 inches
Only 6 corks were included in the 10 tubes I received!
Selected User Reviews For 10x75mm Test Tubes with Cork Stoppers and Cardboard Rack, Borosilicate Glass, 3ml, Karter Scientific 220B6 (Pack of 25)
I've got the Dean & Deluca 40-pack. I counted the glass tubes in the spice tube rack and broke a couple of them. I purchased these test tubes to replace the ones I broke, and they're nearly identical to the ones that came with my spice rack. The only real difference I can see is that the glass on these tubes is slightly thicker, as evidenced by comparing the rims of these tubes to those of original tubes. The corks that came with the spice rack sit about 1/4" higher on these tubes than they do on the original ones due to the extra thickness. The corks that come with these tubes don't go very far into the tubes. Smaller corks, in my opinion, would have been better. Look no further if you need replacement tubes or want to make your own test tube spice rack. These will make you extremely happy.
5mm - Quite frail. This diameter of heavy wall boro usually has a thickness of 4mm. br>During the first use, all of the tubes broke. Three of them shattered during the heating process. The others cracked as they cooled, and they continued to pop and crack for another 10 minutes after they were taken off the heat, leaving very small, dangerous glass shards behind. When borosilicate breaks, it usually shatters into large chunks and is far more resistant to temperature changes than this garbage. br>To test it, I submerged a piece of the broken tube in vegetable oil. The refractive index of genuine borosilicate is one. When the glass is submerged in the oil, it has a density of 47, which is identical to that of vegetable oil - The tube fragment was still clearly visible. They aren't made of borosilicate glass at all.
They can be heated and shaped in the same way that Pyrex can, but they're a little easier to work with! The only reason these might crack a little easier than some people expect is that they're a little thinner, but that's fine with me. They're sturdy enough for me, but they're also lighter, and I needed thinner walls for a reason. They ARE made of borosilicate. There are a variety of ratings, such as 3. 3 Pyrex, which may or may not be correct (I may boil liquids in thicker Pyrex). They did, however, soften and bend (and even fuse!). ) a little easier to work with than thicker, and/or 3. 3 boro. Why haven't I cracked ONE after heating them dry until finally melting them into sealed ampules like professional labware, if they're supposed to crack so easily under slight heat? These are ideal for the task at hand. For me, thinner, name-brand Pyrex is preferable to thicker, name-brand Pyrex because it shields less, and it is lighter. Furthermore, it is extremely cost effective. There are no blemishes. I also got a free cardboard stand to go with my mad scientist lab theme. Seriously, that target of criticism is ideal for holding them for me, to fill, until they are used and sent away separately! I don't have to clean or paint my own stands because I didn't spill something. If you're going to use corks, make sure they're real corks for dry items and sand them down a bit. In comparison to old, crumbling cork, it's actually fresh and pliable! Another freebie! I saved them for other bottles. What else can I get for such a low price?.
Corks will not fit in this container. I'm seeing some reviews now that indicate similar issues, but I didn't see any when I added these to my shopping cart. The cork stoppers that were sent were far too small. Even if I can force a stopper into place, it will only go in about 1/8", and I'm afraid I'll break the tube if I push too hard. The test tubes will be rendered useless as a result of this. br>br>Another point to consider is the packaging. All of mine arrived in perfect condition, which surprised me. It appeared to be decent packaging at first. Within a box, within a box, inside a box, inside a box, inside Paper was in the interior box, and the tubes were in a padded envelope. When I opened the envelope, however, I discovered that all of the tubes were loosely packed in a plastic bag, rattling against one another. They all made it, though. br>br>These would be fine if the corks fit; the tubes are exactly what I needed, but I won't be able to use them if the stoppers don't. I'm not optimistic that swapping them will solve the issue. br>br>I believe the seller should send out new corks that are compatible with these test tubes. Perhaps they simply made a blunder. In a few packages, the wrong size corks were used (the corks were all loose in the box).
- Update- br>br>I began reading other reviews and discovered several references to corks that did not fit. Furthermore, some people have reported having their tubes break while attempting to force corks out, which is exactly what I was concerned about. There doesn't appear to have been any resolutions for people who ordered the wrong size. It appears that some people have the correct corks. br>br>Amazon customer service has been somewhat helpful (offered free shipping if I buy other corks, etc. ), but they can't really fix the problem because they didn't sell this item, which was sold by Lake Charles Mfg. I'll contact Lake Charles and see what I can find out. br>br>In the hopes of finding some more corks in the right size, I measured the test tubes and the corks I received. The test tubes have an internal diameter of only 13mm (and an external diameter of close to 16mm). I'm not sure which of the 16mm corks was supposed to be the 16mm in the item description), but the corks have a small-scale-scale-scale-scale-scale-scale-scale-scale-scale-scale-scale-scale-scale-scale- with a 13-mm end diameter and a large-diameter 17-inch diameter at the end 18mm (cork size 5 perhaps? ), so they're not going to be able to use these test tubes.
Corks do not withstand water and do not leak. Glass tubes provide a strong foundation. Heat can be applied to the tube without the use of a cork. You can make the corks in the tube as tight or as loose as you want. Anything can be accomplished with hard work. Without the cork, the height is 7 inches. Without the cork, the width is 9 inches.
These are ideal for keeping my valuables safe. glass beads at the conclusion Findings for beadwork that are small in size. In the workbench drawer, the filled tubes take up very little room. The corks have remained firmly in place thus far. br>br>These test tubes are clearly long-lasting- For shipping, I anticipated them being wrapped in a lot of bubble wrap. That's not the case. However, none of the tubes were broken. br>br>Funnily enough, my 7-year-old son has a 7-year-old brother. When my niece, who is a year old, asked if she could have one, she made her own snow globe out of glitter and other items. It was incredibly charming. I can see how they could be put to a lot of different uses.
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