BSpeedi-Boot SBH-412 - 4" x 12" HVAC Vent Boot Hanger (SBH 412) ReviewbP PP Speedi-Boot SBH-412 - 4" x 12" HVAC Vent Boot Hanger (SBH 412) PNOTE: Includes only the 4x12 hanger; BOOT SOLD SEPARATELY.PImproved indoor air quality & energy efficiency.PProudly assembled in the U.S.A.PLabor savings with a 2-minute installation means faster project completion.P16" - 24" arm extension capability.