Sun Fire™ E20K 10Gb/sec XFP Optical Transceiver (SR)
375-3301 Substitute with: X5558A, 3TXN181070850×28 Compatible with X Options: 4455A, 5544A, X5544A, 4455A-4, 4466A, 5544A-4, 6644A, X5544A-4