Mary Hubley Oil Brush Set for The Serious Painter – This bristle brush set is all about quality – it’s the best set for serious and professional oil painters. They are perfect for my workshops, with a selection of round, filbert, and flats, and an Egbert to bring out loose and expressive brush strokes. Oil Brush Set for the Serious Painter contains : Richeson Signature Bristle Round: Size 2 and 4; Filberts: Size 6 and 8; Flats: Size 2, 4 and 10; and egbert 4. Grey Matters Signing Brush: Size 1. Jack’s Studio Linseed Soap 1 oz.