Sterile Whirl-Pak® Bags 4oz/120ml are a great multi-use item. Developed over 60 years ago and made in the U.S.A., Whirl-Pak® bags were the first sterile sample bags on the market. Use sterile Whirl-Pak® Bags in reproduction as a collection sheath, end cone, or semen transport container. Or conversely, in rearing to store and/or freeze puppy formula.
Sterile Whirl-Pak® Bags 4oz 120ml are patented under Patent No. 2,973,131 and other patents pending. The film thickness varies from 2.25 mils (0.057 mm) to 4.0 mils (0.102 mm), depending on size and style.