MasterChinese Excellent Chinese Calligraphy Kanji Sumi Drawing Brush - Wolf Hair - Large Excellent quality even for the professionals - Wolf Hair Diameter: 3.1cm (1.22) Hair Length: 10cm (3.9") Shaft: Ox horn. Natural horn, so color varies. This is common, not a defect. Brand: MasterChinese Make sure to have MasterChinese printed on the brush