- Dimensions: 16x100mm
- Scew Caps
- Volume: 10ml
16x100mm Test Tubes, PP Plastic, Round Btm, 10ml Vol, Screw Top, Karter Scientific
|Price:||$5.99 - $89.99|
|Brand Name||Karter Scientific|
|Length||100 millimeters millimeters|
|Outside Diameter||16 millimeters millimeters|
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Screw Top Test Tubes made of PP material, without graduation. Cap and Tube in Neutral color, without label. Caps are mounted. Molded from premium FDA approved food and laboratory grade polymers. These general purpose Tubes are ideal for use in many applications from laboratory analysis to food and beverage service. Polypropylene Tubes are autoclavable, dishwasher safe, chemically resistant, and virtually unbreakable.
Top customer reviews
These are polypropylene and I heard that they could be steam sterilized so I loosened the caps on 10 of the tubes and put them in a quart mason jar and popped them in the pressure cooker for 25 min at 15psi. After cooling most of the way I removed the quart jar expecting to see the tubes distorted. However, to my happy surprise they came out perfectly. I then moved them to my sterile box and proceeded to fill them with agar and make slants. My only complaint (and the reason I only gave 4 stars) is that it is easy to cross thread the caps when you put them back on. Otherwise if you are careful they make a perfect seal. I believe that the ease that the caps can go on cross threaded if you are not careful is what caused some to complain that they were not watertight. For the money these are an excellent deal and since they can be sterilized they can be used in serious work. Although Jello shots are pretty serious also. LOL.
Prior to this purchase,I had purchased the 12 pack of red tube feeders here on amazon with the red push on top. I've already broken 2 of those glass feeders because they use such a thin fragile glass and the top is so tight. It's like a light bulb almost in fragility. I paid 16 bucks for a 12 pack of those Songbird Essentials tube feeders.
Here I am now, buying 100 pieces of plastic test tube, for 12 bucks. Using a 7/64 drill bit, I managed to make a hole in the middle of the cap, that was similar in size to the Songbird feeder. I'm still thinking of a way to put a little red color around the cap, but in a non-toxic manner. Today I just put a drilled, clear, uncolored test tube filled with nectar out and to my surprise, they had drank quite a bit from the non-colored tube.
If you're trying to make a DIY test tube style humming bird feeder for cheap. Get a cheap roll of 16-18 gauge copper hobby wire, and these tubes. The tubes are a polypropylene plastic, so it's safe enough for birds and people alike.
I use these for carrying all sorts of things on backpacking trips. I use them to mainly carry spices as well as pills, cooking oil, powders... anything really.
if you are using these for culture slants or anything similar, make sure you have parafilm, because there is no gas exchange setting on these caps, they are just regular screw caps. so the way to use them for cultures that need gas exchange is to screw the caps in loosely and wrap them in parafilm, or another breathable laboratory film