Pyrex Laboratory Glass 5000ml Round Bottom Boiling Flask

Description

Pyrex 5000 ml Short Neck Round Bottom Boiling Flask 45/50
Previously used I believe, no chips or cracks. The flask has some markings on the glass.
Please see photos.
I purchased this flask on ebay back in June 2015 for a Breaking Bad party as a decoration.
After the party it was put back in a box.
When I cleaned the flask for photos I noticed some black streaks in the glass. I was not able to clean them off and have zero clue what they are from. I also noticed a pencil marking in the marking white area which suggests to me it was used for something.
I definitely can't attest to the integrity of this flask to be used in a scientific environment.
Please feel free to message with any questions, if you want more photos etc. especially if you plan on using this flask in a lab.
This item will be shipped via USPS Priority Mail, which is included in the price.
To ensure what I hope will be a damage free delivery I will need to use extra bubble wrap and other packing materials, most of which will have been recycled from previous purchases of mine ; )
cheers, Meagan
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Please message me if you have questions, I can usually respond within a couple of hours.
eBay member since 2000 with 100% feedback.
Shipping:
When ebay confirms your purchase as 'processing', if that happens M-F by 3pm PST, I can definitely ship same day.
Order received on Sat-Sun will ship Monday.