You cannot add "Cisco Catalyst 9200L - Network Essentials - switch - L3 - 24 x 10/100/1000 (PoE+) + 4 x Gigabit SFP (uplink) - rack-mountable - PoE+ (740 W)" to the basket because the product is out of stock.
Cisco – Network stacking module (pack of 2) – for Catalyst 9200L