This DuraFlex SW 7 x 35 Foot Single Wall Pipe Length is the ultimate in flexible components for strength and flexibility. The duraflex pipe length has a 7 diameter and comes in a variety of lengths.ADA Compliant: No Collection: DuraFlex SW Finish: Stainless Steel Fuel Type: Coal, Gas, Oil, Pellet, Wood Length: 420 Pipe Class: Flexible Liner Pipe Inside Diameter: 7 Pipe Shape: Round Style: Contemporary Modern UL Listed: Yes Vent Construction: Single Wall Weight: 40