77.6mm x 157mm Speaker Port Tube Subwoofer Tube Bass Woofer Box 1pcs U-Shaped Sealing Strips Model :HVFF-4

Model :HVFF-4

Finish : Chemical Blackening

Material: Cold Rolled Steel

you can wrap a circle around it with paper strips or tapes

Features DC 12V voltage

77.6mm x 157mm Speaker Port Tube Subwoofer Tube Bass Woofer Box 1pcs U-Shaped Sealing Strips Model :HVFF-4Features: Speaker Port Tube is used to improve the bass response of many types of speakers. There are plenty of types to help you with your vented box design, and carries tubes of every shape and size, including adjustable length ports and flared ports. These port tubes are a reliable, convenient installation, while at the same time providing a finished, "pro" look to your bass speaker building project. Normal tubes suffer from nasty turbulence at the