Instapak Quick #80 Bags. We have 180 bags. Bags are 22” x 27” and are recommended for boxes 18 x 12 x 12. Each bag contains two part polyurethane foam components which you mixed together at time of use and it expands many fold. These bags are designed to be used with the "Instapack", quick warmer. They don’t expand well at room temperature. These bags sell for at least eight dollars apiece on U-Line. Note that these bags are many years old and may have degraded with time.