This is a set of 4 winding stems. It is compatible with various movements such as NH34, NH35, and NH36. This is the part that connects the movement and the crown. One is usually used per wristwatch, so this is for 4 watches. These are uncut, so please cut them to the required length. Material: Stainless steel Length: 21mm Diameter: 0.9mm They will be packaged with bubble wrap and shipped via Yu-Packet Post Mini. If you have any questions, please ask in the comments section.