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 setup. Crafted from durable slate 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, making it a long-lasting solution for protecting your dimmer switch area from wear and tear. Its robust design not only keeps your vehicle looking clean and polished but also prevents dirt and debris from entering through the floor. Backed by Metro’s 30-year Platinum Warranty, you can trust this part to perform for decades.