Maytronics Dolphin 9991466-ASSY or 9991466-R4 Ultra Fine Filter Cartridges

Does this include the basket or is it just the replacement filters?

These look like the ultra fine. But the pics in comments say fine. The one that came with robot is see through and garbage. is this ultra fine?

can i just buy the ultra fine panels to change out with the basket panels that come with dolphin nautilus or do i need the entire basket?

Will this fit the Dolphin T15 ?