93mm x 135mm Speaker Port Tube Subwoofer Bass Reflex Tube Bass Woofer Box 2pcs Raw Material the heat will not transmit

the heat will not transmit to the battery

Keep your roller cover in good condition by removing frame after use and washing off any paint residue

high wear resistance and long service life

This is a fireproof bag

Widely used in modern buildings

93mm x 135mm Speaker Port Tube Subwoofer Bass Reflex Tube Bass Woofer Box 2pcs Raw Material the heat will not transmitFeatures: 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