... Type: Single - Mode ( 9/125 um ) , Multi - Mode ( 50/125 um , 62.5 / 125 um , )3.Specification: single core , dual - core , the 4 core , 6 ... cores , 12 core . . . etc(according to your requests)4 . the ... depend on user's requirements Technical Parameters : 1 . Insertion Loss ( Single - Mode : PC ≤ 0.2 db ,APC ≤ 0.3 db , ...