AFL's OTDR Fiber Rings are meticulously engineered for precise measurements in fiber optic testing, serving as essential launch and receive cables for Optical Time Domain Reflectometers (OTDRs). Designed to be compact and rugged, these lightweight cables fit easily into OTDR cases, ensuring convenient portability on the go. Available in standard lengths of 150, 500, and 1000 meters, and compatible with a wide variety of connector styles, these fiber rings cater to diverse testing requirements, from assessing link loss to measuring insertion loss and reflectance at both near-end and far-end connections. With options for single-mode and multimode fibers, and the flexibility for special orders, they are an invaluable tool for professionals seeking reliable performance in fiber optic networks.