Designed for easy installation, these bass enhancement tubes fit into your speaker cabinets. The durable construction ensures performance, while the precise engineering enhances the overall sound. It's for casual listeners alike, these tubes bring out the in your music. Features -Color:Black -Material:Plastic -Size:8.00X4.00X4.00cm/3.14X1.57X1.57in -Opening:35mm -Length:80mm -Outer Diameter:40mm -plastic sound enhancement: experience plastic sound with our highperformance bass tube, designed to enhance lowfrequency output for a more dynamic audio experience -Balanced audio output: the speaker air outlet ensures balanced audio output, improving the overall sound of your speaker system -Elegant black finish: the black finish of our speaker enclosure port adds a sophisticated touch to any speaker setup, making it ideal for both home and professional use -Robust construction: our audio port tube is made from durable materials, ensuring it withstands regular use while maintaining excellent sound -Effortless compatibility: designed for easy installation, our speaker pilot hole outlet is compatible with various subwoofer models, allowing for a easy upgrade to your audio system Package list: 8 x Speaker Port Tubes