The group's principal activity is to manufacture and market tietek(tm) products. The main product of the group is a composite railroad crosstie, which is used as a direct substitute for wood crossties. The tietek(tm) crosstie formula is a proprietary mixture of rubber from recycled tires, plastics, other waste materials, additives, fillers and reinforcement agents. The group's crosstie can be installed either manually or with automated equipment and can be fastened with cut spikes or other systems. The group manufactures its products through its wholly owned subsidiary, tietek inc.