10" x 6" (Inside) Adjustable Blade Sidewall Ceiling Register Vent Cover Diffuser Heavy Duty Stamped Steel (Outside Dimension 11.9" x 8") The listed size 14" x

The listed size 14" x 6" is for the inside duct opening measurement

overall outside dimension is 20

The Listed size 14"x 2" is for inside duct opening measurement

Actual outside measurement is 10" x 8"

VERSATILITY: This deflector is built with durable transparent material

10" x 6" (Inside) Adjustable Blade Sidewall Ceiling Register Vent Cover Diffuser Heavy Duty Stamped Steel (Outside Dimension 11.9" x 8") The listed size 14" xThe listed size 10" x 6" is for the inside duct opening measurement. Heavy duty stamped steel face for long lasting use Multi shutter damper with easy handle to adjust desired among of air flow Adjustable blade allows all direction air deflection Individually shrink wrapped with card board pad in the back for extra protection