Features: Experience unparalleled auditory sound with our High clearly puredly bass speakers vibration membrane set. Sensitivity to improve low frequency sound reproduction for a richer bass effect for immersived sound experience. From durability metal and rubber, this passive bass woofer diaphragm offers high strength and long service, ensuring consistent performances over time. Perfectly for use in closed cabinet speakers, this vibrating plate is widely applicable in various auditory setups, including woofers and loudspeakers, to optimized sound. With its newly improved radiator designing, you can easily tune the passive radiator to achieve your desired frequency, delivering outstanding tone and immersive Auditory enjoyment. Specifications: Size:about 53x53mm/2.09x2.09in Component: Rubber Edges and Iron Plate Quantity： 2PCS Package Includes: 2pcs Loudspeakers note: Please allow 1-2cm errors due to manual measurement,please make sure that do not mind before order. Due to difference between different monitors, the picture may not reflect the actual color the item.