These can be added to all Jesmonite composites to give increased strength in thin section castings, and also to act as a filler to assist in laminating (see relevant instructions for further details). They are available in three types: 6mm and 12mm Standard, and 12mm Coarse which are designed specifically for use with Jesmonite AC730 to create a premix. Chopped strands can also be used to add impact resistance when applying thin sections of Jesmonite to carved objects made from polystyrene.