an aircraft conveyor system comprising an aircraft including an aircraft cargo storage bay ; and a roller mounted within the aircraft cargo storage bay , the roller including a one - piece integral body having a cylindrical shape , the entirety of the body being made solely out of a single piece of polymeric material , said body having a length extending from a first outermost end to a second outermost end and a diameter and a first and second exterior shoulders at the ends , said body including an aperture extending longitudinally along and through the center of said body from the first outermost end to the second outermost end , the aperture sized to rotatably receive an axle therethrough , the axle being for mounting the roller within the aircraft cargo storage bay , wherein the roller has a burn rate of less than 4 . 0 inches per minute .