hg power 4 inch duct connector flange abs straight pipe flange air duct hose connector for 4" duct pipe ventilation hvac ducting hg power <b>feature:</b> <br><br>material: quality abs; <br>color: black; <br>size: 4 inch; <br><br><b>note: </b> <br><br>1.made of new quality abs material with 4inch. <br>2.great and beautiful round design make perfect for what you need. <br>3.easy installation to contact the ventilation ducting. <br>4.straight pipe flange ventilation ducting connector. <br>5.we have worriless 12-month and friendly customer service.if there exist any problems, please feel free to contact us. we will reply immediately in 24 hours.