The product is a 100+ feet VELOCITY Corning Glass ClearCurve Optical Fiber cable, specifically designed for optical network connections. This black cable features a fiber cable design. With a length of 100+ feet up to as much as 150 ft. this high-quality optical fiber cable is ideal for use in networking and communication systems, providing reliable and efficient data transmission. Made by the trusted brand Corning, this cable ensures superior performance and durability for your networking needs. (May be in two pieces on spool.) This is remainder of spool after connecting a home to WIFI network. Spool is approximately 9.5" diameter.