This filter holder (manufacturer's no. PLA582W) is for filters with a diameter of 58mm. It therefore also fits a Lelit Mara PL62X.
Left:
Lelit PLA582W product page: https://espresso.lelit.com/accessoryg...
Product page Lelit MaraX ("MaraX comes with a LELIT58 portafilter"): https://marax.lelit.com/index-eng....
By the way, Lelit also offers an upgrade kit for the wheels (water/steam) and the cover lever in walnut wood (manufacturer's no. PLA2200): https://espresso.lelit.com/accessoryg...