Since the early 70's, Dynatect has supplied OEM and replacement units to numerous transit authorities and bus manufactures throughout North America. Dynatect and ATG Autotechnik GmbH provide complete articulation solutions beyond the main bellows, including articulation joint and center hoop components. Bellows for transportation vehicles are manufactured from a variety of materials including pure elastomers, elastomer coated fabrics , urethane coated fabrics, and PVC coated fabrics. The proper material is selected on the basis of environmental conditions, flame retardant requirements and smoke emission regulations.