Features: Significantly boost the low frequency of your speaker system and subwoofer. Crafted from plastic, these bass Reflexes tubes are optimized for small speakers and 4inch wooden enclosures, ensuring superior sound quality. Ideal for audiophiles improved sound performances, Sound enthusiasts looking for high quality components, and students in Sound engineering programs. Perfect for home theater systems, portable Sound devices, music production studios, and public performances, providing bass support in any setting. With a user friendly design, these bass port tubes are easy to install without complex tools, making them essential upgraded for enhancing your Sound setup's bass response. Specifications: Component:ABS Size:Approx.80mm/3.15inch Package Includes: 10Pcs Speaker Port Tube note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.