Description: NoteIf you have any questions, please contact us before open any case, we promise will solve the problem for you. Thanks Thickness: 0.7mm Material High quality metal Model B177+178 Package 1Set Spring + outer casing This clock spring will not fit if there is a pin in the housing. Please be careful. A sprung spring can cause damage. This spring is best if it is pressed into the housing. Suitable for most milling machines Please pay attention to your size when purchasing Note: 1. Please allow minor deviation due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Communication is the best way to solve the problem. If you have any problems after purchasing, please contact us in time, before opening return or cas