8w X 4"h Never Rust Plastic 2-Way-Vertical Air Supply Register - HVAC Vent Duct Grille - Off White [Outer Dimensions: 9.75"w X 5.75"h]

10w X 8"h Never Rust Plastic 2-Way-Vertical Air Supply Register - HVAC Vent Duct Grille - Off White10"w X 8"h Is The Size For The Duct Opening Measurement Only, Actual Front End Outer Dimensions Are 11.75" Width X 9.75" Height - SEE BELOW IN DESCRIPTION How To Measure A GrilleYou may think of grilles and registers as a generic component of the ventilation system in your house. But they are also the most visible representation of you air system. These grilles and registers give you an extra measure of quality that are visible to your family members and house guests. Never Rust ABS Plastic is your best bet for longevity. This will never rust, and is very easy to clean. Every part is hand inspected for quality before it is packaged, no exceptions. No Sharp Surface Edges. Just run your finger along the edge of the top plate and you will find a smooth finished surface. Rigid Gauge ABS Plastic. Rigid gauge built for durability and long life in mind, but still light and handy. Powder-Coat Finish - Smooth, Shiny, Scratch-Resistant, Beautiful. Looks Like It Was Just Waxed Quality Packaging - Carefully Shrink Wrapped With Cardboard Backing To Prevent Damage In Shipment Easy Unrestricted Air Flow For Your HVAC System How To Measure A Grille Overall Size: Measure the size of the air duct/drywall opening. Do not measure the overall size of the register itself, only measure the "hole" in the wall/duct. Every grille has a front end frame, that will overlap at wall joint. Total outer size of this grille is; listed size +1.75". Width vs Height The first number in a grille size, represents the width, the second number represents the height. Example: If your hole is 20" wide by 14" tall, order a 20x14. If your hole is 14" wide by 20" tall, order a 14x20.