flexibility and wear-resisting quality assurance, the safety is assured:

1) comply with IThe pen head USES advanced chongqing bristle, the hair quality rigid, has the good 

SO standards (no heavy metal harmful to human health)

2) conforming to qb-t /1749-1993 brush standard

Application: sutable for watercolor painting, gouache painting, acrylic painting, oil 

painting, etc.