You cannot add "Cisco Catalyst 9300 - Network Advantage - switch - L3 - Managed - 24 x 10/100/1000 (PoE+) - rack-mountable - PoE+ (445 W)" to the basket because the product is out of stock.
Cisco Small Business SF110D-16 – Switch – unmanaged – 16 x 10/100 – desktop, wall-mountable