Features: This bandpass car speaker enclosure system enables full-range stereo reproduction and impressive response. The subwoofer enclosure is designed for optimum response and low frequency reproduction, for ideal for high power or sound quality subwoofers. Design and construction ensure the ultimate tight fit of all parts, ensuring a rattle and noise-free environment. Specially formulated wood glue ensures a seal between all parts and a second application of glue on all internal joints after final assembly. Pneumatically applied braided nails tension and hold components during the glue drying process and help ensure a leak-free, rattle-free air chamber. Specifications: Material: Wooden Size: 4 inches Size: 5 inches Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 1x Car Subwoofer