The PL6105 is a white PP plastic hinged lid for the 4 and 5.3 gallon EZ Stor pails. This is a heavy-duty pail lid and is ideal for industrial, heavy-duty applications. When fastened to a pail, these filled pails can be stacked on top of each other to optimize storage space. The EZ Stor pail lids are stackable. The lids nest neatly inside of each other and are made of durable PP. The lid initially snaps onto the pail and then the front half of the tear-tab can be removed, turning the lid into a hinge-style lid. This lid is not recommended for freezer applications. This lid has been equipped with a tear-tab tamper-evident mechanism. Once the lid has been initially fastened to the pail, it cannot be removed without removing the tear-tab. Polypropylene (PP) is marked with the resin identification code of 5. PP is less flexible than LDPE, somewhat stiffer than other plastics, reasonably economical, and can be translucent, opaque, or of any color. PP has very good resistance to fatigue, and has an extremely high melting point (320 degrees Fahrenheit or 160 degrees Celsius).