The Lian Li TU150 doesn’t come with any dust filter at the bottom. As the bottom fan is responsible for the intake of air, it will be dusty.
It retails for US$11.32 (S$16), and shipping to Singapore is an additional US$4.62 (S$7).
Lian Li TU150 casing supports two 120mm fans, and hence this dust filter will fit nicely. Installation is easy since this dust filter is magnetic. You can stick it to the bottom of your case without the need for any screws or tools.
The mesh of this dust filter is made of medical-grade synthetic mesh. I am not sure what difference does it makes.