1. PREMIUM MATERIAL: Made of premium paper. The sealed round edges are strong enough to resist scratches and stretching, blocking dirt and protecting the coils. 2. RUBBER EDGE: The speaker cone with a rubber edge (diaphragm) is the front of the speaker. As the coil moves back and forth, the drive cone vibrates like a drum skin, emitting sound and penetrating the air. 3. HIGH PERFORMANCE: The paper speaker drum has a smoother high-frequency roll-off, but the paper cone can absorb moisture from the air, changing its mass and damping characteristics. 4. ACCURATE SIZE: The outer diameter of the speaker cone drum paper is 98mm, the inner diameter is 26mm, and the height is 18mm, with accurate sizes. 5. APPLICATION: Subwoofer cone drum paper for 4-inch speakers with 2 paper covers, used after installation, easy to install without complicated steps or tools. We not only offer high-quality products but also long-term customer service. When you purchase our products, you will receive comprehensive support even after the purchase, allowing you to shop with confidence and satisfaction.