79mm x 110mm Speaker Port Tube Subwoofer Bass Reflex Tube Bass Woofer Box 2pcs Curtain Grommets With 4 Thread Hole: M3

With 4 Thread Hole: M3

Package Content: 90pcs x Furniture Feet Glide Nail

Holding Force : 1050N

200(+/-2%) x Hollow Copper Rivet

Lever Arm can be rotated to the left by 90 angle and to the right by 90 angle

79mm x 110mm Speaker Port Tube Subwoofer Bass Reflex Tube Bass Woofer Box 2pcs Curtain Grommets With 4 Thread Hole: M3Features: 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