This is a Fairy Washboard ( file leafed haworthia) succulent plant which comes in a 7cm pot.
It is a slow growing succulent which is perfect for arid/dryer set ups.
It prefers to dry out I between watering, and water around the base.
It reproduced by producing 'pups' around the mother plants, which can be carefully removed and planted in separate pots once they establish their own roots.
They prefer an arid soil mix.