Kwik Fill® bags are compatible with all automatic packaging equipment. They're made with LK®s exclusive Tuf-R® resin for the added strength that' s needed for the stresses of automated packaging equipment. Kwik Fill® bags are pre-opened for easy loading and feature precise perforating for easy separation, so they also work great for manual applications. Because these bags are made from 100% virgin low density polyethylene, they meet FDA requirements for use in food applications.