This dimmer switch grommet is designed for vehicles with a 2-1/2" flange and a 1" inner diameter, making it a perfect fit for your dimmer switch area. Crafted from durable medium blue rubber, it features a flange that secures easily into your carpet or floor mat, ensuring a snug and reliable fit. Built with state-of-the-art rubber compounds, this grommet is resistant to chemicals, sunlight, and ozone, providing long-lasting performance and protection. Its thoughtful design not only enhances the look of your vehicle's interior but also ensures the dimmer switch is properly shielded and functional. Backed by Metro's 30-year Platinum Warranty, you can trust this part to deliver dependable quality for decades.