Feature:1. DURABLE MATERIAL: The paper speaker cone drum is made of high grade paper, strong enough to resist scratch and stretch, a sealed round edge would block the dirt and protect the coil.2. WITH RUBBER SURROUND: The speaker cones with rubber 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.3. MULTIFUNCTION: 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.4. PRODUCT SIZE: 5 inch paper speaker cone subwoofer cones drum paper with Outer diameter: 75mm/3.0in; inner diameter: 20mm/0.8in; depth: 16mm/0.6in.5. WIDELY USED: The cone is at the front part of the loudspeaker. Paper speaker cone drum paper is suitable for 3 inches speaker.Specification:Item Type: Speaker Cone Drum PaperMaterial: Rubber, PaperProduct Size: Outer Diameter: Approx. 75mm/3.0in; Inner Diameter: Approx. 20mm/0.8in; Depth: Approx. 16mm/0.6in.Package List:1 x Speaker Cone Drum Paper2 x Paper CapNote:All data are measured manually, and there are certain errors in the measurement results.