Features: 1PRODUCT SIZE: 8 inch paper speaker cone subwoofer cones drum paper with Outer diameter: 195mm / 7.7inch inner diameter: 36mm / 1.4inch depth: 38mm / 1.5inch. 2DURABLE MATERIAL: The speaker cone drum is made of high grade glass fiber, strong enough to resist scratch and stretch, a sealed round edge would block the dirt and protect the coil. 3WITH GLASS FIBER SURROUND: The speaker cones with glass fibre surround(diaphragm) is a front part of the loudspeaker. When the coil moves forward and back, drives the cone like a drum skin vibrating to make sound and into the airs. 4MULTIFUNCTION: The drum paper has a smoother high frequency roll off, but the paper cone can absorb moisture from the air, changing its mass and damping characteristics. 5PRODUCT PACKAGE: You will receive 1pc speaker cone drum paper and 2pcs paper cap. You can use it after installation, easy to install and use. Package included: 1 x&nbspSpeaker&nbspCone&nbspDrum&nbspPaper 2 x Paper&nbspCap