You cannot add "Cisco - QSFP+ transceiver module - 40 Gigabit LAN, 100 Gigabit Ethernet - 40GBASE-BiDi, 100GBASE-BiDi - LC multi-mode - up to 100 m - for Mellanox ConnectX-5 Ex EN" to the basket because the product is out of stock.
Cisco Business 350 Series 350-24T-4X – Switch – L3 – Managed – 24 x 10/100/1000 + 4 x 10 Gigabit SFP+ – rack-mountable