51mm x 142mm Speaker Port Tube Subwoofer Bass Reflex Tube Bass Woofer Box 4pcs 1-1/4" Nut Center to Center Distance:

Nut Center to Center Distance: 98 x 48mm/4-inch x 2-inch(L*W)

Connect the two pin to electric circuit

85-inch (D*H)

Terminal Number: 10 Terminals

51mm x 142mm Speaker Port Tube Subwoofer Bass Reflex Tube Bass Woofer Box 4pcs 1-1/4" Nut Center to Center Distance: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