Fiber Optic Patch Cords, Available for OEM Orders Key Specifications/Special Features: Insertion loss: <=0.3dB (maximum) SM and <=0.5dB (maximum) MM Return loss: >=45dB (PC polishing), >=55dB (UPC polishing) and >=60dB (APC polishing) Durability (500 matings): <=0.2dB increase (maximum) Operating temperature: -20 to +75 degrees Celsius OEM orders are welcome