Samba, horse, deer, weasel, cat, sheep, and goat are the animals whose hair is most often used in the manufacture of Chinese and Japanese brushes. The coarsest and stiffest hair is that of the samba, the horse, and the back of the deer. The hair of the weasel and the inner arch of the deer is less coarse and stiff. The hair of the cat, sheep, and goat is softer, finer, and has less spring. Brushes made of bamboo resemble samba hair in coarseness and behavior.