1PCS Opening Hole 81mm Length 153mm Speaker Port Tube Suitable for 8-12 inches Speakers gray

Feature： 1. Made of high quality ABS plastic materials, durable and not easy to damage. 2. The inner wall is smooth and the two ends are flared. Airflow is very unobstructed, obviously improving airflow sound. 3. Suitable for 8-12 inches speakers. Enhance the sound quality of the speaker, let you experience more beautiful sound. 4. Speaker inverting hole, also known as sound tube and air hole, often used in inverting type speakers. 5. Mainly is the box speaker vibration airflow sound out of the front and the horn before the radiation of sound pressure overlap, producing bass effect. Specification： Item Type： Speaker Inverting Tube Total Length： Approx. 153mm6.02in (as picture) Speaker Housing Opening Diameter： Approx. 81mm3.19in (as picture