Attributes . Aluminum Duct, Ideal Applications Application, Gray Color, 8 ft Length, Aluminum Material, 10 Bulk PK Package Quantity, The Continuous Lock Seam Permits The Duct to Be Pulled Open, Compressed, Bent and Re-Bent Without Developing Leakage Special Features, UL 2158A;UL/cUL Listed Class 0 Standards Met, Round Duct Style, 3.14 cu.ft Weight, 4 in Width . Names