2-Inch Speaker Port Tubes (2-Pack), 50mm Diameter ABS Flared Port for Subwoofer & Speaker Cabinets, Smooth Inner Wall Reduces Chuffing for Cleaner Bass, Fits Car Audio, Home Theater

fosa Speaker Port Tube Sponge Bass Tube Foam Plug 2pcs 55mm x 50mm for Minimizing Standing Waves Enhancing Bass Response for Speaker Subwoofer DIY

Speaker Port Tubes for Bass Enhancer, Subwoofer Air Ports Repalcement & DIY Parts 42.5mm x 80mm Speaker Cabinet Port Tube, 4-Pcs(Black)

uxcell 4Pcs 76mm x 89mm Speaker Port Tube Subwoofer Bass Reflex Tube Bass Woofer Box Port Tube Vent

MECCANIXITY 5Pcs 75x150mm/3 x 6 Inch Speaker Port Tube Subwoofer Bass Box Tube Bass Woofer Box Speaker Box Bass Air Port for DJ/PA Speaker Cabinets

Keenso 3 Inch Speakers Port Tube with Inverted Tubes, 4 Piece Woofer Connector to Improve Sound Pressure, Suitable for Computer Speakers, 95 Mm Long

Junluck Speakers Port Tube, Smooth Woofer Connector Tube, 80mmx42.5mm 4Pcs for 4-6Inch Speaker(Tube Opening 42 Length 80mm 3 inch to 5 inch)

MECCANIXITY 5Pcs 38x147mm/1.5 x 5.8 Inch Speaker Port Tube Subwoofer Bass Box Tube Bass Woofer Box Speaker Box Bass Air Port for DJ/PA Speaker Cabinets

Acogedor Speaker Port Tubes for Bass Enhancer, Subwoofer Air Ports Repalcement & DIY Parts 76mm x 90mm Speaker Cabinet Port Tube, 4-Pcs, Thincolk1876rfpte1034

2Pcs Speaker Port Tube, 40mm x 43mm Subwoofer Port Tube Bass Port Reflex Tube Speaker Cabinet Port Inverter Tube