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3521A-T04A
Standard thread diameter: The thread is clear
Length: 3 Meter/10ft
Head Size: 10x4mm/0
Straight 4 flutes are ground to provide rapid chip removal for efficient threading
65mm x 74mm Speaker Port Tube Subwoofer Bass Reflex Tube Bass Woofer Box Port Tube Vent 20set 3521A-T04AFeatures: 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
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