The switches CRS354 series. These switches have 48x 1GbE ports but also 4x SFP+ and 2x QSFP+ ports. The SFP+ ports are for 10GbE and the QSFP+ ports are for 40GbE. On the MikroTik CRS354-48G-4S+2Q+, the 48x 1GbE ports are standard ports.
There is another variant, the MikroTik CRS354-48P-4S+2Q+ which has PoE on the 48x 1GbE ports. If you are looking to power access points or 1080p / 4K video cameras, it is an intriguing rackmount solution that has significant upstream ports for storage or LAN/ WAN access.