Installing or replacing HVAC ductwork in your home can be a headache. HV2 spiral ductwork is intended to reduce your concerns. The appearance of HV2 is clean. It is sealed at its connection points by internal rubber gaskets, not external tape and sealant.
Gustafson HV2 Tee, 7 x 7 x 7 in Diameter, 11-5/8 in Length, 5-7/8 in Width, For Use With: High Velocity Self-Sealing Ductwork