10 Pack 7" Round x 24" Long (Total 20 Feet) - 30-Gauge Round Duct Sheet Metal Pipe - Snap Lock Vent Pipe [10 Pieces, 2' Each] Aluminum Bar it ensures long-lasting performance 4 X 12 Is CRFG2028 Width_14in

it ensures long-lasting performance

+ Product Details Perfect Fit & Easy Sizing - Designed for a 16" x 22" OR 22" X 16" duct opening (measured at the opening)

Smooth Surface Edges - Run Your Fingers Across The Surface To Feel The Smoothness

+ Product Details Size - 14"w X 24"h X 2"d (for duct opening measurement only)

Looks like it was just waxed

10 Pack 7" Round x 24" Long (Total 20 Feet) 30 Gauge Round Duct Sheet Metal Pipe Snap Lock Vent Pipe [10 Pieces, 2' Each] Aluminum Bar it ensures long lasting performance 4 X 12 Is CRFG2028 Width_14in it ensures long lasting performance + Product Details Perfect Fit & Easy Sizing Designed for a 16" x 22" OR 22" X 16" duct opening (measured at the opening)