Up for sale is a lot of 4 Cisco QSFP-40G-SR-BD Transceiver Modules.
These are brand new in the package as picturedThe part number is 10-2945-02.

Cisco QSFP-40G-SR-BD (40G offeri)

The Cisco QSFP 40-Gbps offerirectional (offeri) transceiver (Figure 1) is a pluggable optical transceiver with a duplex LC connector interface for short-reach data communication and interconnect applications using MultiMode Fiber (MMF). The Cisco QSFP 40-Gbps offeri transceiver offers customers a compelling solution that enables reuse of their existing 10 gigabit duplex MMF infrastructure for migration to 40 Gigabit Ethernet connectivity.

The Cisco QSFP 40-Gbps offeri transceiver supports link lengths of 100 and 150 meters on laser-optimized OM3, and OM4/OM5 multimode fibers, respectively.

The Cisco offeri transceiver complies with the QSFP MSA specification, enabling customers to use it on all QSFP 40-Gbps platforms to achieve high-density 40 Gigabit Ethernet networks.

Each Cisco QSFP 40-Gbps offeri transceiver consists of two 20-Gbps transmit and receive channels in the 832-918 nanometer wavelength range, enabling an aggregated 40-Gbps link over a two-strand multimode fiber connection.

Figure 1.

Cisco QSFP offeri 40Gbps transceiver: Duplex MMF with LC connectors at both ends