YINETTECH 2Pcs Optical Power Meter Fiber Adapter Conversion Head M16 ST

["Compatibility: This optical fiber adapter conversion head supports ST connectors, allowing seamless connection between different fiber interfaces and optical power meters or light sources.","Precision Signal Performance: Designed for accurate fiber testing with insertion loss ≤0.6 dB and repeatability ≤0.1 dB, ensuring stable and consistent measurement results during optical power testing.","M16 Thread Mount Design: Features a M16 (0.63 in) threaded interface with 16 mm inner diameter and 18 mm outer diameter, suitable for large-type optical power meter probes. Please confirm your device port size.","Zinc Alloy Construction: Built from high-strength zinc alloy, providing excellent wear resistance and mechanical durability, rated for over 1000 insertion cycles without performance degradation.","Reliable in Harsh Conditions: Operates in temperatures from −25°C to 90°C and can be safely stored between −25°C and 85°C, making it suitable for field fiber testing and maintenance environments."]