3-Inch Square Ventilation Grille - Technical Diagram & Specifications #1403903 (License: Personal Use)

This is a technical line drawing of a 3-inch by 3-inch square ventilation or speaker grille, featuring a central circular opening with a symmetrical eight-petal floral louver pattern. The top edge shows three mounting tabs or clips, indicating it’s designed for flush or recessed installation. Dimensions are clearly annotated for manufacturing or installation reference.

Used on product specification pages, HVAC catalogs, lighting fixture datasheets, or DIY installation guides where users need exact dimensional and design details for compatibility and planning.