Steel vent covers are lightweight, durable, and available in the widest range of powder coat finishes — a versatile choice for floor, wall, and ceiling applications. Cast iron covers are the heaviest and most durable option with a traditional, ornate look and are essentially indestructible, making them popular for Victorian, Craftsman, and farmhouse-style homes. Brass covers offer a warm, classic aesthetic with excellent corrosion resistance and develop a natural patina over time. Cast aluminum is lightweight yet strong, well suited for ceiling and wall applications and commercial settings.