2Pcs 100mm x 160mm Speaker Port Tube Subwoofer Bass Reflex Tube Bass Woofer Box Port Tube Vent 9.8x7.9x5.9 Inch you need to install the

you need to install the waterproof sealing strip in the junction box on the cover by yourself

100% brand new and never be used

protects your walls from damage and conveniently holds your door open

* Magnetic

Outer Dia : 16mm/0

2Pcs 100mm x 160mm Speaker Port Tube Subwoofer Bass Reflex Tube Bass Woofer Box Port Tube Vent 9.8x7.9x5.9 Inch you need to install theFeatures: 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 reflex speaker building project. Normal tubes suffer from nasty turbulence