Aria Vents Lite Warm Gray 4”x10”, $22.99 USD/Box, LL Flooring (Lumber Liquidators)

Easily customize these vents to match your flooring by using a precut piece of flooring material in the center tray. Designed for simple drop-in installation, this model, made from high-grade ABS plastic, is robust enough for heavy use in both residential and commercial spaces. It provides airflow similar to standard vent grills.