Check the listing for details. 6x4 Modern AC Vent Cover - Decorative White Air Vent - Standard Linear Slot Diff. Color: White, Width: 7 7/8", Condition: New. Listed at 31.99 USD. Commercial Grade Solid Aluminum with Modern Architectural Design This Model can be used in Ceilings, Walls, and FloorsThis Model can be used as a Supply Vent Cover and Return Vent CoverCFM: 104 ft3/min - Effective Velocity: 9.8 ft/s Neck: 5 3/4" x 3 7/8" - Face: 7 7/8" x 5 7/8"This is a Non-Filter Model*This is a Design and Utility Patent Pending Product*Texas Buildmart offers High Quality Standard Linear Slot Diffusers. This model shoots a 90-degree spread with option to adjust to one side or the other. They have decorative directional dampers. Modern, crisp, clean lines and architecturally appealing. Solid extruded aluminum profile with welding - Electrostatic Paint. This product can be used as a supply and as a return register vent cover for ceilings, walls, and floors but looks like a Modern Contemporary looking fixture. If this model is used as a Return, please make sure this vent cover is placed in full open position or remove the directional dampers. This is a Design and Utility Patent Pending Product. 6 x 4 6x4 4x6 4 x 6 How to install Standard Linear Slot Diffuser: https://youtu.be/2vmJdVYm500