These cables are QSFP to XFP Cable your requirement

FIberStore provide QSFP+ cables including QSFP+ to 4 SFP+ Breakout Cable, QSFP to CX4 Cable, QSFP to XFP Cable. These cables are available in lengths up to 20m, and we also offer custom cable length to meet your requirement.the ever growing need to cost-effectively deliver more bandwidth, and they can be customized in different length to meet your requirement For SFP, there is no additional signal conditioning provided in the module specification.  Essentially, with the interface to SFP modules (called the SFI interface), the signaling requirements are very much more strict then the signaling required from XFI interfaces to the QSFP to XFP Cable modules.Essentially, with the interface to SFP modules (called the SFI interface), the signaling requirements are very much more strict then the signaling required from XFI interfaces to the QSFP to XFP Cable modules.  For SFP+, the onus has been placed on the 10GbE Controller's serial PHY to be able to supply a more robust signal, and also to receive the signal unadjusted from the module.