Enhance your audio experience with premium sponge plugs designed for speaker port tubes. These plugs are ideal for improving sound quality in bass reflex tubes and loudspeaker woofer vents. Perfect fit for standard bass reflex tubes, ensuring improved sound clarity and bass response. Durable Material: Made from high-quality sponge, these plugs withstand regular use while effectively dampening unwanted frequencies. Easy to Install: Simply insert these lightweight plugs into your speaker's port tube for immediate sound improvement. Slight variations in appearance and printed text may occur between batches; these do not affect functionality. Size (Diameter × Height): 42×65 mm / 53×50 mm / 33×50 mm / 48×65 mm / 58×50 mm Color: Black Material: Sponge Package Contents: 2 × Sponge Plug Note: Light reflection and display differences may cause slight color variation between the image and the actual product. Measurement tolerance is ±1–3 cm.