Single-mode fiber optic cables are used for high-speed, long-distance data transmission. The indoor tight buffer cable version of single-mode fiber is designed specifically for indoor environments and offers several benefits suited to various applications. Each individual fiber is coated with a tight buffer layer, which provides physical protection and simplifies handling and termination. The fibers are bundled together and enclosed in a protective outer jacket made of LSZH flame-retardant material suitable for indoor use.