3.25-pound 1.5kg or 1,500gm moisture absorbing container strip pack with adhesive backingcontents: 80-percent clay desiccant/20-percent caci2 calcium chloridethis strip pack is made of 10 uncut tyvek pouches with adhesive sticky backing which allows packets to be easily be attached to the inside of the container wall or ceiling, closet, garages, basement, storage, etc. Protect your cargo against -inchcontainer rain-inch and other moisture problems during shipment including mildew, mold and corrosion.about 12 strips per 20′ container and 24 strips per 40′ container. Usage can vary depending on your application, conditions, length of storage, etc.