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  • 25mm X 150mm (1" X 5.75") 50ml Polycarbonate Test Tubes with Screw Caps 6/pk
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25mm X 150mm (1" X 5.75") 50ml Polycarbonate Test Tubes with Screw Caps 6/pk

| 6 answered questions

Price: $9.95 + $6.95 shipping
In Stock.
Ships from and sold by SCIENCESHOPUSA.

Specifications for this item
Brand Name The Science Shop®
Mfr Part # 6543K
Material Type Plastic
Pkg Qty 6
Capacity 50  milliliters
EAN 0802759065435
Item Volume 50  milliliters
UPC 802759065435

25mm I.D. X 150mm (1" x 5.75") 50mL POLYCARBONATE TEST TUBES WITH SCREW CAPS 6/PK Screw cap can ... Read full product description



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Product Features

  • Approx 50ml capacity
  • Approx Inside diameter 25mm
  • Approx 150mm long
  • Cap can be used as stand

Product Details

  • Shipping Weight: 10.4 ounces (View shipping rates and policies)
  • ASIN: B005CBFATS
  • Average Customer Review: 4.7 out of 5 stars  See all reviews (23 customer reviews)
  • Amazon Best Sellers Rank: #6,571 in Industrial & Scientific (See Top 100 in Industrial & Scientific)
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Frequently Bought Together

25mm X 150mm (1" X 5.75") 50ml Polycarbonate Test Tubes with Screw Caps 6/pk + SEOH TEST TUBE RACK PLASTIC For 24 tubes 25mm + Plastic Beaker Set - 5 Sizes - 50, 100, 250, 500 and 1000ml
Price for all three: $22.94

These items are shipped from and sold by different sellers.

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Product Description

25mm I.D. X 150mm (1" x 5.75") 50mL POLYCARBONATE TEST TUBES WITH SCREW CAPS 6/PK Screw cap can be used as stand This item has a thicker wall than a glass test tube and will not fit in a standard 25mm test tube rack.


Customer Questions & Answers

Customer Reviews

4.7 out of 5 stars
5 star
18
4 star
4
3 star
0
2 star
1
1 star
0
See all 23 customer reviews
So they have a screw cap, just like on your two-liter soda bottle.
G. Mesick
Works well and as described, would recommend this product to future buyers, well made and priced right for this item.
Terry S.
Great for holding batteries, and survival seeds, kits and what not.
mikeymountaindew

Most Helpful Customer Reviews

11 of 12 people found the following review helpful By G. Mesick on April 18, 2012
There are many things you can do with these, but I bought them specifically to store yeast for my home brewing hobby. While I like to imagine I am a mad scientist in my brewing, I realized that I didn't actually intend to hold these over a Bunsen burner or anything. And while you can't put them over a flame, you can put them in your freezer, which is what I need to do with them. I just wanted to store a couple of ounces of yeast easily. These do the trick.

They are--as you may have read by now--just the plastic "blanks" for soda bottles (before expanded in the process of turning them into actual soda bottles). So they have a screw cap, just like on your two-liter soda bottle. They hold two ounces (60 milliliters) of whatever you choose--far more than whatever idea of a test tube you have in your mind. And because the marketing idea is using these as a "toy" science kit for clumsy little fingers, I find them as they should be: easy to handle and break-proof.

This is an easy way to build your own "yeast farm" and avoid having to buy a new package of yeast every time you brew. And besides, they are kind of fun. You can show all your friends how these can be blown up to big soda bottles, all while explaining to them that you bought them for purely practical reasons. And isn't that part of the reason you got into the hobby in the first place? To give you something to talk about with other people (well, that, and to have something to drink while you talk)? Enjoy!
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3 of 3 people found the following review helpful By Kurtis Cummings on February 10, 2014
Verified Purchase
I am a homebrewer and regularly save my yeast. At $7-$10 per vial or smack pack of yeast, it can get quite pricey. These preforms worked EXCELLENT. The seal is great, they came delivered in a plastic bag, in a box, with great protection. The preforms are made of plastic - they seem a little larger, and a little more durable than the White Labs vials.

I begin by making a large starter - 1000 to 2000 mL. I always make a starter because 1 vial of saved yeast isn't really enough to pitch directly into a batch of anything higher than 1.030 starting gravity.

I typically make a 800-1000ml starter using 1/2 cup DME for an average (1.040-1.060) batch of beer.

Make a large (1500-2000ml with 1 cup DME) yeast starter, chill, and pitch your vial/smack-pack of yeast

Allow the starter to ferment out completely. This usually takes 2-3 days, and you'll know it's done when the yeast drops out and your wort/beer clears up. You could also throw the starter into the fridge after it sits on the stir plate for 16-18 hours. Leave it there for a day or so, to allow all the yeast to go dormant and fall out of suspension (Cold Crash).

Sanitize a small funnel and 5-6 yeast caps & vials

Position the sanitized vials in a container that allows them to sit upright for filling

Pour out mostly all of your starter wort/beer, leaving only enough to swirl the yeast into suspension.

Sanitize the lip of your starter flask, swirl the slurry in the bottom to get everything into suspension, then funnel the slurry into your vials.

Screw on your caps and label the vial with the strain of yeast it contains.

Viola! You now have yeast, ready to go to make a starter for your next batch of beer.
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3 of 3 people found the following review helpful By Amazon Customer on February 8, 2012
Verified Purchase
I picked up these to hold yeast nutrient and energizer (bought a pound of each) so that I could easily see how much I have, as well as measure what I need without issue. You can invert the cap (opening up) and rest the tube in it to hold it for you (very cool). Also, since they're polycarbonate, I'm not at all concerned about them breaking either from being dropped, falling from eye level, or getting bumped in a kit box. I've actually purchased three of these 6 packs total, so I have plenty on hand for other things. I might use one for some vanilla beans I'll be ordering soon.
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1 of 1 people found the following review helpful By Catharine Parr on March 27, 2014
Verified Purchase
We used these tubes for measuring out liquid meds for caregivers to give my invalid father. This allowed me to be able to keep track of his meds and ensured he had the correct number and amount of meds each day. These tubes fit into an upturned DUPLO (large Lego) block for storage right side up.
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OK, first off, some clarification. These are NOT polycarbonate, as listed in the description. They're PET-- soda bottle preforms. Bottling companies buy these in bulk, then heat and inflate them into a mold to form soda bottles. You can be forgiven for thinking they're polycarb, though. PET is very, very durable at this thickness. It'll scratch, but the force required to crush it is fantastic. A star off because the description is wrong and sometimes the material does matter.

The cap comes in two parts. Once securely screwed on, the lower ring remains behind if it's opened again, exactly as with a soda bottle. Of course, the bottle can be sealed and re-sealed, but the safety ring detaches on the first use. The cap's durability is comparable to a soda cap (because it IS a soda bottle cap).

Whether or not it floats depends on how much weight you put inside and whether you've screwed on the cap. Don't expose it to fire or extreme heat, or corrosive chemicals.

The uses for this product are innumerable. They can be used to contain powders and other samples (though bear in mind that this is plastic, not glass, and so reactivity is an issue in scientific experiments). Preppers can store everyday carry survival items. Home brewers store yeast cultures. It can store small quantities of adult beverages (just under a shot). Hikers can carry food supplies, or keep a couple batteries or a flash drive dry. Field medics can keep medicines in it (with the safety seal helping you see if something needs to be replenished). It can also be used for geocaching.

Overall, I'm very happy, but the seller needs to update their description.
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