These granules are available in different color and sizes too which can be customized according to clients need. ABS resin has both the characteristics of tough, hard, just slow combustion and flame is yellow have black smoke, plastic softening after burning, burning, issued a special smell of cinnamon, but no molten dripping phenomenon, is one of common engineering plastics ABS grades: General purpose grade High flow grade Extrusion grade Flame retardant grade High heat grade Transparent grade