Is blue box size one inch and perforated? Price?

This parafilm is 4 inches wide by 125 feet long. Parafilm is not like tape it's more like thicker, more stretchy saran wrap. When you cut of a small piece it can go a long way, even form an airtight seal. The nature of Parafilm wouldn't be conducive to perforations.

Does "4 inch" mean that it's 4 inches wide? Why are there two rolls in the picture, one role wider than the other? Do you get one of each? Or?

The title says "4 Inch x 125 Feet", the product features say "4 Inches x 125 Feet" additionally the specifications section states "Number of Items=1" So you get one roll, that measures 4 inches wide by 125 feet long. The page is controlled by Amazon, so we cannot change the picture, that's the picture Amazon used for the product and also Amazon controls all of the listing...so thanks for the question, if it seems unclear, you can contact Amazon to request a change of the listing.

Hello, what is the advanteage of Parafilm over standard household shrinkwrap? Thank you.

There is no advantage or disadvantage between parafilm over shinkwrap usage. There is a functional difference, though. Parafilm is used to “seal” an opened jar or bottle. After opening a jar, for example, you put the lid back on the jar and use the parafilm to seal it from the outside air. This is especially useful in laboratories where expensive chemicals go bad over time after exposure to the air. Parafilm slows down this process and keeps the chemcal useful for a longer period of time after initial exposure to the air. And thus, saving money.

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Description

🔬 Elevate Your Experimentation Game!

QUALITY ASSURANCE - ISO 800 equivalent guarantees reliable performance.
EXPERIMENT WITH EASE - Protect your samples and projects effortlessly.
SEAL WITH CONFIDENCE - Self-sealing technology ensures a tight fit on irregular surfaces.
USER FRIENDLY DESIGN - Easy to use, making it ideal for professionals and enthusiasts.
VERSATILE APPLICATIONS - Perfect for labs, classrooms, and home experiments alike.

Parafilm M - 5259-04LC PM996 is an all-purpose laboratory film designed to safeguard products and maintain quality. With self-sealing capabilities and compatibility with various surfaces, it's perfect for use in labs, classrooms, and home experiments. The film boasts an ISO equivalent of 800, ensuring high-quality performance for all your experimental needs.