![Amazon.com: uxcell 50mm x 122mm Speaker Port Tube Subwoofer Bass Reflex Tube Bass Woofer Box 1pcs : Electronics Amazon.com: uxcell 50mm x 122mm Speaker Port Tube Subwoofer Bass Reflex Tube Bass Woofer Box 1pcs : Electronics](https://m.media-amazon.com/images/I/51WVrWKM+ZL._AC_SX425_.jpg)
Amazon.com: uxcell 50mm x 122mm Speaker Port Tube Subwoofer Bass Reflex Tube Bass Woofer Box 1pcs : Electronics
![Amazon.com: uxcell 64mm x 115mm Speaker Port Tube Subwoofer Bass Reflex Tube Bass Woofer Box 1pcs : Electronics Amazon.com: uxcell 64mm x 115mm Speaker Port Tube Subwoofer Bass Reflex Tube Bass Woofer Box 1pcs : Electronics](https://m.media-amazon.com/images/I/51QdrMC3gZL._AC_SX425_.jpg)
Amazon.com: uxcell 64mm x 115mm Speaker Port Tube Subwoofer Bass Reflex Tube Bass Woofer Box 1pcs : Electronics
![Amazon.com: uxcell 86mm x 91mm Speaker Port Tube Subwoofer Bass Reflex Tube Bass Woofer Box 1pcs : Electronics Amazon.com: uxcell 86mm x 91mm Speaker Port Tube Subwoofer Bass Reflex Tube Bass Woofer Box 1pcs : Electronics](https://m.media-amazon.com/images/I/51q8FgPG3mL._AC_SX425_.jpg)
Amazon.com: uxcell 86mm x 91mm Speaker Port Tube Subwoofer Bass Reflex Tube Bass Woofer Box 1pcs : Electronics
![Subwoofer Vent Suitable For 12/15/18 Inch Professional Stage Speaker Inverted Tube Guide Tube Connector Length 200mm Hole 110mm - Connectors - AliExpress Subwoofer Vent Suitable For 12/15/18 Inch Professional Stage Speaker Inverted Tube Guide Tube Connector Length 200mm Hole 110mm - Connectors - AliExpress](https://ae01.alicdn.com/kf/HTB1rLf5c8fM8KJjSZPiq6xdspXa0.jpg)