Set of two Flat-pointed Marker brushes- I use them a lot, hope you'll find them as useful as I did!
"watery" marker has a slight blur and color mixing when you use a lot of pressure
"juicy" marker is more vibrant and opaque but still retaining its texture and has a hint of colour mix-
Basically an edit of a watercolour brush I had on CSP which actual name I can't recall so if you have a flat watercolour brush it's probably that one (?)

Category 1