Is Tan Mujiang's horn comb ox horn or ox horn?

Carpenter Tan's comb, yellow is horn, and black is black buffalo horn, both of which are the cheapest horns. The cost is usually only a few dollars. Carpenter Tan mainly sells brands, and a few dollars' comb can sell for eighty or ninety. If you give it away, others will feel tall. If you use it yourself, you are advised not to use carpenter Tan.