Speedi-Products SM-28A90 12 12-Inch 28-Gauge 90-Degree Round Adjustable Elbow
12-Inch Sheet Metal 28 Gauge adjustable elbows * Used in HVAC round pipe and flexible Warm air duct systems * For turns through 90 degrees and are simple to adjust * Seal joints with approved duct mastic sealants * Insulate Ductwork for improved energy efficiency and comfort