Speaker Port Tubes Bass Reflexes Tube Speaker Vent Improve the Bass Connector 3-5" Response of Many Types Accessories

High quality material, practical and useful. Effectively pours out the airflow inside the box for high sound quality. Overlaps with the sound radiated from the front of the horn to produce a effect. Speaker Port Tubes Bass Reflexes Tube Speaker Vent Improve the Bass Connector 3-5 Response of Many Types Accessories. brand new and high quality. Features: High quality material, practical and useful. Effectively pours out the airflow inside the box for high sound quality. Overlaps with the sound radiated from the front of the horn to produce a effect. Easy to install. for Ideal accessories for 3-5in inverted speaker. Speaker Tubes only, other accessories demo in the picture are not included!. Specification: Material: Plastic. Type: Accessories. Color: Black. Opening Hole Diameter: 35mm 1.38in. Length: 80mm 3.15in. Front Outside Diameter: 44mm 1.73in. Tail Outside Diameter: 33mm 1.30in. Quantity: 1 Set. Note: 1. No retail package. 2. Please allow 0-1cm error due to manual measurement. plz m