The Auralex StudioDoors™ are built using a proprietary core stack-up of materials, including Auralex SheetBlok™ Sound Barrier in StudioDoor™ 48 for additional isolation. The StudioDoor™ is the perfect finishing touch to your acoustically isolated studio. StudioDoors™ are wood-based, delivered pre-hung and ready to finish. Our StudioDoors offer exceptional STC ratings of 37 (StudioDoor™ 37), 41 (StudioDoor41) and 48 (StudioDoor48) and are available in these versions: Left hand Inside, Left hand Outside, Right hand Inside and Right hand Outside.