Breast Milk Storage Bag Color Clear Graduations Graduated UNSPSC Code 42231905 Volume 6 oz. Pre-sterilized and have a patented double click ÔnÕ secure zipper seal and double-sealed seams to prevent leakage Pump directly into bags with any Lansinoh breast pump, milk storage bags attach directly to pumping set For use with other pumps (fit most Medela, Ameda & Evenflo pumps), attach Lansinoh Pump Adapter to the pumping set and bags; adapters sold separately