Features 1.Rubber, Paper: Speaker cone drum paper is made of high grade rubber and paper, which is tough and durable, abrasion and scratch resistant, and has a long service life. 2.Sealing Edges: The sealing rounded edges of speaker cone drum paper are strong enough to resist scratching and stretching, blocking dirt and protecting the coils. 3.Function: The speaker cone with rubber surround (diaphragm) is the front part of the speaker. As the coil moves back and forth, the driving cone vibrates like a drum skin, emitting sound and entering the air. 4.Superior Performance: The rolled cone has a smoother high frequency roll off, but the cone can absorb moisture from the air, which changes its mass and damping characteristics. 5.: The outer diameter is 156mm/6.14in; the inner diameter is 26mm/1.02in; the height is 30mm/1.18in; the standard and size, easy to install. specificationItem Type: Speaker Cone Drum Paper Material: Rubber, Paper Size: Outer Diameter: Approx. 156mm/6.14in Inner Diameter: Approx. 26mm/1.02in Height: Approx. 30mm/1.18in PackageList2 x SpeakerConeDrumPaper 2 x Paper Hat NotePlease allow some error in manual measurement.