Vitamin K2, also known as menaquinone, is an important class of fat-soluble vitamins and one of the indispensable and important vitamins in the human body. Because of its very small content in food, it is known as "platinum vitamin". According to differen
1, titanium cyclcorss bike frame with handing finish finished;2, taper head tube and BSA thread 1.37"X24T BB Shell;3, breeze dropout and PM disc barke;4, frame weight: 1.7kgAll our frame size can be made according to your requirements.