API test tubes

You think If I call API they can tell me which line is 5ml??

 

LOL - I don't know, I'd be pretty confused about that!

 

It's why no matter what I use a medical syringe. API is accurate just not thier tubes

 

yeah, i need to get a syringe. Just ran some test and all says its good... just seem to have a margin of error

 

Haha nice! I can't ever get the water to line up perfect anyways when I dip the vile. I'm glad my other testers came with syringe. But I bet API has a margin of error in the quality dept. I would message them just to hear what they say.

 

Plus the cards have me convinced that I'm colorblind. 2-3 shades look almost the same to me. Lol

 

I have to take the cap off and look through the tube. Seems to help

 

The "5 ML" line is just kind of a generic quotation meaning "This test tube has the ability of holding 5 ML's" :

 

I wonder if the glass is thicker/thinner on some bottles and thus, effecting the lines location. If the glass is thicker, the line will be higher on the bottle.