【Dimension】- Outside Diameter: 195mm/7.61"; Convex Outside Diameter: 180mm/7.02"; Convex Inside Diameter: 146mm/5.69; Inside Diameter: 136mm/5.3". | 【High Quality Materials】- The Foam Speaker Surround Ring is made of foam, pliable, anti-aging and durable.This foam edge is ideal for speakers repair or DIY. | 【High Quality Materials】- The Foam Speaker Surround Ring is made of foam, pliable, anti-aging and durable.This foam edge is ideal for speakers repair or DIY. | 【Easy to Install】-The Speaker Foam Edge is easy to follow step-by-step installation instructions, free technical support, easy to install. | 【Feature】- The Foam speaker rings have exquisite craft, wear-resistant, and help to get nice audio effect for low pitch sound.