4Pcs 76mm x 89mm Speaker Port Tube Subwoofer Bass Reflex Tube Bass Woofer Box Port Tube Vent H4 * Total Length: 56mm /

* Total Length: 56mm / 2

Vehicle Specific Fit: for BMW 318i 1996-1999

Installation Notices: 1

for VW Transporter syncro (1993 - 2004)

Fit Hose Inner Diameter: 16mm / 0

4Pcs 76mm x 89mm Speaker Port Tube Subwoofer Bass Reflex Tube Bass Woofer Box Port Tube Vent H4 * Total Length: 56mm /Features: 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