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Whirl-Pak’s Sterilized Filter Bag are designed to simplify clean pipette collection. Our 330 micron filter layer contains solid particles to one side of the bag preventing pipette blockage for a clean sample and even plate distribution.

Whirl-Pak® Write On Sterilized Sampling Bags provide a secure, contaminant free flexible container that ensures dependable analysis results. You can count on Whirl-Pak® products as a proven, economical and efficient way to collect, store and transport samples.

Why do users prefer Whirl-Pak Filter bags?

Features for your Benefit:

• Full-Page Filter for clean pipette sampling
  • The hole diameter in the filter layer measures .33 mm (.013 inches), 330 microns, and there are 285 per square cm (1,840 per square inch).
  • The filter layer inside the bag is sealed into both sides and bottom perimeter, allowing the sample to be placed in the bag on either side. Liquids of a blended sample will transfer through the filter, while solids remain separate and contained.
• Clear sample identification for organization and traceability
  • The convenient Whirl-Pak Write-on makes labeling quick and easy with pen or marker!
• Maximum protection against leaks
  • Our signature continuous perimeter seal ensures satisfaction during sample collection, analysis and storage for leak-proof results.
  • Accommodate solid, semi-solids and liquids
• Sterilized for results you can trust
  • Whirl-Pak understands your need for a sterilized container, that is why our bags go through post-manufacturing sterilization, known as +1 Sterilization. This additional step is instrumental in our process for your trust and satisfaction.
  • Sterility documentation available to lookup and download for easy digital and record keeping
• Extreme film clarity and strength
  • The polyethylene blend used for Whirl-Pak bags is superior in strength and clarity and sterilized after manufacturing. With Whirl-Pak you are getting quality you can trust, every time.
• Aseptic collection design elements
  • Intentionally designed, our opening Tyvek® Pull Tabs are perpendicular to the opening of the bag. This feature keeps your hands away for a safe, aseptic collection technique each time.

All sterile closure Whirl-Pak bags are R-NASE, D-NASE, Pyrogen and BPH free; our bags also comply with regulatory and industrial requirements of USDA, FDA, HACCP and EPA.

Additional Product Information:

• Do not use bags at temperatures above 180°F (82°C).
• Whirl-Pak bags can be frozen to any temperature, even liquid nitrogen temperatures down to -320°F (-196°C) – careful handling is required after freezing.
• Volume/capacity is measured when the bag is closed and tab is folded over three times (volume and dimensions are approximate ±5%).
• Shelf Life from Sterilization date is found on the Sterility Documentation: 5 years from Sterilized date found on your Sterility Confirmation

Filter Bags

*B01523 and B01589 have been discontinued and are no longer available.