10" x 4" Adjustable Blade Sidewall Ceiling Register Vent Cover Diffuser Heavy Duty Stamped Steel (Listed Size is for Duct Opening or Inside Measurement)First thing to know about size selection: take the vent cover off the wall or ceiling. Measure the duct opening where the vent can fit in. Use the measurement to determine right size to buy. This product has listed size 10w X 4h is for duct opening measurement only, actual outsize overall dimensions is 12 wide by 6 high. If your duct opening size is 10 x 4, this is the right size and will fit in well. If you measure outside or surface size, you will

Independent cardboard packing for extra protection

Distance between the two screw holes is 13

Electrolux

ENHANCE COMFORT: When your heating/AC system blows air into the comfort zone in your room

the 14" x 6" is the listed size

Distance between the centers of two screws is 7"

SIZE - 3/8" OD

actual outsize overall dimensions is 14“ wide by 8” high

If your duct opening size is 14” x 8”

Two layers PVC core with reinforced nylon in between and 304 stainless steel braided outer cover for high performance and durable water supply applications

IAPMO Lead Free

durable material to withstand many different operating conditions