●  主体直径40 mm，孔径8 mm。

The main diameter 40 mm, diameter 8 mm.

●  体积小，质量轻，结构紧凑，安装方便

Small volume, light weight, compact structure,

convenient installation

●  应用于精密工作环境，电机，绣花机等工控领域

Used in precision work environment, motors, industrial

embroidery machine etc.