You cannot add "Cisco - SFP+ transceiver module - 16Gb Fibre Channel (SW) - fibre optic - LC multi-mode - up to 400 m - 850 nm - for P/N: DS-X9448-768K9=" to the basket because the product is out of stock.
Cisco – QSFP+ transceiver module – 40 Gigabit LAN – 40GBASE-BiDi – LC multi-mode – up to 150 m – 832-918 nm – for P/N: N6K-C6004-M12Q=, N7K-F312FQ-25=, N9K-C9396PX, N9K-X9636PQ, N9K-X9636PQ-RF