657A1 (common bend-insensitive fiber for FTTH drops): Now trading at $22/km, up from $12–14/km in mid-2025 (an increase of approximately 80%). At GL FIBER, we specialize in manufacturing premium bare fibers that meet rigorous industry standards. 657A2 Bare Fibers Why Choose G. 657A2?ast right-hand digit when considering the specification limits. This method is in accordance with the rounding method of ASTM Practice E29 (Standard Practice for using significant diITU-T (International Telecommunication Union) defines several single-mode fiber standards, including G. This article intends to provide a clear explanation of G. The real difference shows up when. As of March 2026, G. 657A2 has reached $35 per kilometer — with many suppliers warning that prices could climb even higher in the coming months if demand pressure continues. The current. FTTH/FTTX Deployment: Essential for tight-bend installations in homes, buildings, and junction boxes.