16"W x 4"H

Item No:	Size (Duct Opening)	Neck Size	Material	Outer Dimensions	Color	Airflow Direction	Bulk Pricing						Order
Item No:	Size (Duct Opening)	Neck Size	Material	Outer Dimensions	Color	Airflow Direction	1	2-10	11-20	21-49	50+	100+	Order
210400-16	16"W x 4"H		Steel	17-3/4"W X 5-3/4"H	White	Adjustable	$32.67	$27.77	$26.14	$24.51	$22.87		Quantity for 16x4 Steel Adjustable Air Vent Cover \| Supply Register for Wall & Ceiling \| White \| Outer Dimension: 17-3/4"W X 5-3/4"H
421108-11	16"W x 4"H		Aluminum	17-3/4"W X 5-3/4"H	White	Adjustable	$39.09	$33.23	$31.28	$29.32	$27.37		Quantity for 16x4 Modern Aluminum Air Vent Covers & HVAC Grilles \| Wall & Ceiling \| White \| Outer Dimension: 17-3/4"W X 5-3/4"H

Let's get the fit right the first time