Dell Force10 GP-QSFP-40GE-1SR Compatible 40GBase-SR4 QSFP+ Optical Transceiver Module (MMF, 850nm, 150m, MTP/MPO, DOM)

Force10 GP-QSFP-40GE-ESR Compatible 40GBase-CSR4  QSFP+ Optical Transceiver Module (MMF, 850nm, 400m, MTP/MPO, DOM)

Force10 GP-QSFP-40GE-1LR Compatible 40GBASE-LR4 QSFP+ Optical Transceiver Module (SMF, 1310nm, 10km, LC, DOM)