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Ships within 48 hours · Estimated delivery Sep 9 - Sep 14
Inner Diameter x Outer Diameter: 17
Applicable to all kinds of hanging windows and casement windows
The installation is suitable for solid walls and concrete walls
Made of metal material in silver tone
93mm x 135mm Speaker Port Tube Subwoofer Bass Reflex Tube Bass Woofer Box 2pcs Tape Inner Diameter x Outer Diameter: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