This mountain bike bearing bowl group is made of aluminum alloy with CNC processing and features Taiwanese genuine bearings. It has a surface treatment of anode and is available in black and red colors. The bowl group specifications include a bowl cover of 28.6mm, top bowl of 1-1/8 inches, and lower bowl of 1.5 inches. It is compatible with straight tube and rotary cone tube forks, making it suitable for 1.1-1/8 straight forward fork and 1-1/8 turn 1.5 cone forward fork. The package includes 1PCS bowl group.