Off Grade : Off Grade refers to plastic resin that does not meet the standard specifications for prime grade material, often due to minor variations in color, melt flow index, or contamination. It is still functional but may have lower performance characteristics.

Stock Lot : Stock Lot materials are typically surplus or excess materials from a manufacturer. These could include prime grade materials that are no longer needed, discontinued products, or excess production stock that is being sold off.

Floor Sweep : Floor Sweep materials are often byproducts of industrial processes. These are materials that have been collected from the production floor, often during changeovers or from spills. They may contain mixed grades, contamination, or degraded polymer.