Enhance your audio experience with our premium sponge plugs designed specifically for speaker port tubes. These plugs are ideal for improving sound quality in bass reflex speakers and loudspeaker woofer vents. Compatible with standard bass reflex tubes, they help enhance sound clarity and bass response. Material: Made from high-quality sponge, these plugs are durable and effectively dampen unwanted frequencies. Easy to Install: Simply insert the plugs into your speaker's port tube for immediate acoustic improvement. Note: Due to different production batches, there may be slight variations in product appearance and printed text. These differences do not affect performance. Size (Diameter x Height): 53 x 50mm Color: Black Material: Sponge Package Contents: 2 x Sponge Plug Note: Light reflection and differences in display screens may cause slight color variations between the image and the actual item. Measurement error allowed is +/- 1-3cm.