96mm x 238mm Speaker Port Tube Subwoofer Bass Reflex Tube Bass Woofer Box 2pcs Push Button Switches Note: Before ordering

Note: Before ordering

* Easy to install and easy to use

Pull head up to release and disassemble

*Perfect as a set of replacement caster wheels for home or office chairs that have hard

Measures voltage range of AC 0-250V with accuracy of Class 1

96mm x 238mm Speaker Port Tube Subwoofer Bass Reflex Tube Bass Woofer Box 2pcs Push Button Switches Note: Before orderingFeatures: 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