The Alpine Subwoofer Trim Ring is specifically designed for the S2-W10D4 and S2-W10D2 models, providing a sleek and seamless integration for your car audio system. This trim ring, made by the reputable brand Alpine, enhances the overall look and functionality of your vehicle's speakers. Perfect for those looking to customize and upgrade their car's audio system with a high-quality and reliable subwoofer trim ring.