A1 is a single-mode fiber with a smaller bending radius than G. A2 is used primarily in outdoor applications. 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. As a reliable high-performance bending insensitive single mode fiber, G657A1 has superior bending performance compared to G652D fiber. ce 80 Term 10 D Impact strength White, Red, Black, Yellow, Violet, Pink,vel in the perform. So the fiber has an outstanding attenuation coefficient, low water-peak and a good trans ission performance. So it can completely meet the requirements of FT.