This Speaker Frame with Chrome Steel Grill is designed for 4X6 oval speakers and is compatible with 2005 and older Peterbilt 370 series models. It features a platinum interior concert series sound system and rosewood trim, adding a touch of elegance to your vehicle's audio system. With its practical design and easy installation, this speaker frame is a perfect choice for enhancing the sound quality in your Peterbilt 370. Sold individually, this speaker frame is a practical and stylish addition to your truck.