Like other conveyor systems, plastic belt conveyors are intended for use with certain types of materials or items, while other types of materials or items may not be suitable for this type of coneyor. Fine, granular or particulate matter, for example, may fall through the individual cogs of the plastic belt, leading to damage to the machine and a loss of materials. Small part or screw type conveyors are usually used in place of a plastic belt conveyor if fine particulate matter must be moved. The plastic conveyor system is popular in light industrial settings, as well as in food processing settings. Plastic belt conveyors can also be fitted with aligning wheels and used for an assortment of applications including, product justification, sorter, merging, gapping and descrambling. This particular type of plastic belt conveyor is called Activated Roller Belt (ARB).