20 grid speed counting disk

This grid speed counting disk motor speed dial is made of ABS material and mould unlike the acrylic version that can not provide a blocking effect and could be easily penetrated by strong infrared rays, The size is very precise and the key is opaque.

Technical Specifications:

1. Code wheel diameter: 25.75mm
2. Code plate thickness: 2.58mm
3. Number of gratings: 20
4. Raster length: 4mm
5. Grating width: 1.2mm