Founded in 1925, Keilwerth is a well-known German saxophone manufacturer, which was acquired by the Buffet Group in 2010 and became a subsidiary. Keilwerth hired jazz saxophonist Peter Ponzol as a consultant in 1986 and rose to prominence and began to improve the saxophone in combination with jazz styles. Its main feature is its loose and slightly clear tone, and even the NEA Jazz Master Lifetime Achievement Award-winning liebman, jazz masters Ernie Watts, Kirk Whalum and Grove rWashington Jr use their saxophones. Keilwerth's Black neckel is the most outstanding collection that took several years to create, and its rich, warm tone is a jazz and pop instrument, and its most iconic product. It is worth mentioning Keilwerth's SX90R series, which is specially customized for musicians who play personalized timbre styles, and the production techniques are precise and delicate, especially suitable for playing jazz music, and the price is more than 18,000 yuan.