93mm x 135mm Speaker Port Tube Subwoofer Bass Reflex Tube Bass Woofer Box 2pcs Raw Material This is a fireproof bag

This is a fireproof bag

): 72mm x 72mm x 49mm (L*W*H)

Operating temperature: -5~60 Degree Celsius

Package Content: 2Pcs x Air Conditioner Drain Hose Connector

93mm x 135mm Speaker Port Tube Subwoofer Bass Reflex Tube Bass Woofer Box 2pcs Raw Material This is a fireproof bagFeatures: 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