Overview Reviews Product Description Dust-flex is an economical choice for sawdust collection and fume ventilation in woodworking applications.The clear PVC allows blockages to be detected and the flexible construction allows for easy installation. Greenline Industrial Hose Catalog Product Videos Custom Field Product Reviews Write a Review Write a Review × Greenline 4" x 10' Dust-Flex Ducting Hose DF-400 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *