2-Pack Premium Stainless Steel Washing Machine Hoses - 4 FT No-Lead Burst Proof Red and Blue Lined Water Inlet Supply Lines - 90 Degree Elbow Connection - 10 Year Warranty The Listed size 12"x12" is

The Listed size 12"x12" is for inside duct opening measurement

actual outside dimension is 19

Difference between "inside" and "outside": Inside (duct opening) is the measurement you can see after taking the vent off the wall or ceiling

actual outside dimension is 16" X 10"

The Listed size 12"x 12"is for inside duct opening measurement

2-Pack Premium Stainless Steel Washing Machine Hoses - 4 FT No-Lead Burst Proof Red and Blue Lined Water Inlet Supply Lines - 90 Degree Elbow Connection - 10 Year Warranty The Listed size 12"x12" is2 Pack 4FT Red Blue Lined Stainless Steel Braided Washing Machine Hoses with Universal 3 4" 90 degree connector. Key Features: Two layers PVC core with reinforced nylon in between and 304 stainless steel braided outer cover for high performance and durable water supply applications Universal connector fits all washing machines Comply with ASME A112. 18. 6 2017 CSA B125. 6 17, NSF ANSI 61,372 While typical water supply pressure ranges 50 80psi, our