Chinese Yixing Pure Clay National Grade Zisha Teapot Huang Duan Ni Chanzhong Hu Tea Pot 330ml National Grade ChanzhongTeapot Material: Top Huang Duan Ni Capacity: 330ml Width: 5.2 inches Height: 4 inches This teapot is made by an artist named Fan Yi, who is a national grade zisha maker. She chosen top huang duan ni to make this teapot, and the mud was provided by He Qirong, who is a famous purple sand master in China, born in Yixing, graduated from the University of Geosciences in Wuhan, researchs the composition of purple sand and geological mining distribution. So, this teapot is a classic works from two famous purple sand master. It has very high collecting value!!!!