Horton announces the release of its new WindMaster Plastic MS9 Fan. The WindMaster MS9 is an aerodynamically-shaped, nine blade fan designed for Class five, six and seven truck and bus applications. WindMaster Plastic MS9 Fans are available in both clockwise and counterclockwise rotation, with diameters from 22 to 30 inches. This durable, lightweight fan delivers greater airflow with improved efficiency. The hubless fan has a hexacomb pattern on the center section for improved stacking ability and reduced shipping and storage costs.