The Grand General Closed Back Rubber Mounting Grommets are a practical solution for 4" LED lights. Made with cold-resistant PVC and thermal plastic rubber (TPR), these grommets are designed to withstand harsh weather conditions. With a closed back water-tight design, they help prevent water damage, ensuring the longevity of your Grand General LED lights. Sold individually, these grommets are a reliable and cost-effective choice for protecting your lights and ensuring their optimal performance.