10 Pack 4" Round x 24" Long (Total 20 Feet) - 30-Gauge Round Duct Sheet Metal Pipe - Snap Lock Vent Pipe [10 Pieces, 2' Each] Condensate Pump + Product Details Perfect Fit Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Perfect Fit & Easy Sizing - Designed for a 8" x 20" or 20" x 8" duct opening (measured at the opening)

actual front end outer dimensions are 21

+ Product Details Size - 36"w X 14"h X 2"d (for duct opening measurement only)

MATERIAL QUALITY - Our rectangular duct cap is made of high-quality galvanized sheet metal material (galvanized steel construction for durability and rust prevention)

Ideal for Walls & Ceilings: Designed for seamless installation in standard 18" X 12" duct openings

10 Pack 4" Round x 24" Long (Total 20 Feet) 30 Gauge Round Duct Sheet Metal Pipe Snap Lock Vent Pipe [10 Pieces, 2' Each] Condensate Pump + Product Details Perfect Fit Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Perfect Fit & Easy Sizing Designed for a 8" x 20" or 20" x 8" duct opening (measured at the opening) actual front end outer dimensions are 21