Types of HAlR, vegan hair(synthetic, nylon, imitation of animal fiber), natural hair (goat hair, pony hair,badger hair, raccoon hair,squirrel bristle hair) and Nylon/Synthetic hair can be wave hair or straight hair.
Grade of natural hair (goat hair can beXGF,BJF,ZGF,HGF ). Different grade of hair have different degree of softness, and different price range.
Brush Shape can be Round, tapered, angled, pointed,fan, flat, wave.
Brush Length, which can decide what it looks like, how much the brush needs.
Handle: design, material, color, logo prinitng.