2900XL Series Catalyst Rack Mount Kit, STK-RACKMOUNT-1RU This rack mount kit is compatible to mount Cisco Catalyst 2900XL series switches into either a 19", 23", or 24" equipment rack depending on the way you attach the bracket (see images below). This rack kit includes 2 brackets and all screws needed to attach the rack mount brackets to your switch. This rack kit fits the following models: WS-C1912-A WS-C1912C-A WS-C1924-A WS-C1924-EN WS-C1924-EN-DC WS-C1924C-A WS-C1924F-A WS-C1912-EN WS-C1912C-EN WS-C1924C-EN WS-C1924F-EN WS-C1924-EN-DC WS-C2912-XL-A WS-C2912-XL-EN WS-C2924-XL-A WS-C2924-XL-EN WS-C2924C-XL-A WS-C2924C-XL-EN WS-C3512-XL-A WS-C3512-XL-EN WS-C3524-XL-A WS-C3524-XL-EN WS-C3524-PWR-XL-EN WS-C3548-XL-A WS-C3548-XL-EN WS-C3508G-XL-A WS-C3508G-XL-EN Possibly will fit other 1RU units ... This kit does NOT fit non XL or M models, or WS-C1900