The GI-HK Series Optical Encoder Kit Housing Diameter:30mm; Solid/hollow Shaft Diameter:3-10mm; is a reliable and high-performance encoder kit suitable for a wide range of industrial applications. Our factory is proud to manufacture these encoders with precision and care to ensure consistent and accurate readings even in challenging environments. The housing diameter of 30mm and solid/hollow shaft diameter between 3-10mm make this encoder kit versatile and flexible for different equipment. Whether you need accurate position and speed feedback or reliable motion control, our encoder kit is an excellent choice.