Features: Elevates your music experience with our ABS Speaker Port Tube, to enhances bass response and sound quality in your DIY speaker projects. Craft from high grade ABS plastic, this port tube ensures durability and optimals acoustics performances for 3-10inch subwoofers, making it a reliable component for any sound system. Suitable for audiophiles, DIY enthusiasts, and customs speaker builders who are look to improve their home theater or sound system with professional grade music parts. Perfect for use in customs builts or upgraded home entertainment systems, recording studios, and any space where superior sound is desired. The installation process is straightforward; simply drill appropriate sized hole and insert the port tube for instantly boost in low frequency claritys and depth. Specifications: Component:Plastic Multiple Size as Picture Show; Color:Black Option Type:18x37mm,35x80mm,42x65mm,45x115mm,50x114mm,50x122mm,:60x110mm,65x74.5mm,66x78mm,82x110mm,98x160mm, Package Includes: 2pcs Speaker Inverter Tubes note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.