You cannot add "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" to the basket because the product is out of stock.