These speaker tuning tubes are essential for anyone looking to improve their sound system. They help to fine-tune the bass output, ensuring a balanced and immersive audio experience. The black finish and robust design make them a reliable choice for enhancing the performance of your subwoofers and portable speakers. Features -Color:Black -Material:Plastic -Size:8.00X4.00X4.00cm/3.14X1.57X1.57in -Opening:35mm -Length:80mm -Outer Diameter:40mm -Enhanced low frequencies: our subwoofer bass reflex tube significantly enhances lowfrequency output, providing a richer and more immersive listening experience -Optimized sound clarity: the speaker box port tube ensures optimized sound clarity and balanced audio, enhancing the overall performance of your speaker system -Modern black design: the black finish of our portable speaker outlet adds a sleek and modern touch to any audio setup, making it suitable for various environments -Durable and reliable: constructed from durable materials, our audio reflex tube is designed to withstand regular use while maintaining excellent sound -Simple installation: our speaker vent tube is easy to install and compatible with a wide range of subwoofers, allowing for a quick and convenient upgrade to your audio system Package list: 8 x Speaker Port Tubes