... from 155M to 10G,2,All compatible Transceivers SFP,GBIC,BIDI,XFP,XENPAK,X2,SFP+,CWDM,G-PON,E-PON Modules,like Cisco ... have stock for regular items.4,Telecom grade quality, it is like original one.5,Good price, it is only 10-20 ... ,Good profit for my customer, our price is very lowest than original SFP modules.3,Our SFP modules 100% compatible with allmost switches ...