On the page You can find prices for: 12 x 6 air register
EZ-FLO 61612 Two-Way Sidewall/Ceiling Register, 12 inch x 6 inch Opening, White
$7.47
EZ-FLO 61614, White Three-Way Sidewall/Ceiling Register, 10 inch (W) x 6 inch (H)
$7.13
AC Infinity AIRTAP T6, Quiet Register Booster Fan with Thermostat Control. Heating Cooling AC Vent. Fits 6” x 12” Register Holes.
$79.99
12"w X 6"h Adjustable AIR Supply Diffuser - HVAC Vent Cover Sidewall or Ceiling - Grille Register - High Airflow - White [Outer Dimensions: 13.75"w X 7.75"h]
$13.98
10"w X 8"h 3-Way Aluminum Curved Blade Adjustable Air Supply HVAC Diffuser - Full Control Vertical/Horizontal Airflow Direction - Vent Duct Cover [Outer Dimensions: 11.65"w X 9.65"h]
$16.64
Accord ABSWWH2126 Sidewall/Ceiling Register with 2-Way Design, 12-Inch x 6-Inch(Duct Opening Measurements), White
$13.88
HVAC Premium 12" w X 6" h 2-Way-Flat Stamped Steel - Vent Cover - Grille Register - Sidewall or Ceiling - High Airflow - White [Outer Dimensions: 13.75" w X 7.75" h]
$10.61
12"w X 6"h 3-Way AIR Supply Grille - Vent Cover & Diffuser - Flat Stamped Face - White [Outer Dimensions: 13.75"w X 7.75"h]
$10.19
12" x 6" Adjustable Blade Sidewall Ceiling Register Vent Cover Diffuser Heavy Duty Stamped Steel (Listed Size is for Duct Opening or Inside Measurement)