Features: The high precision linear scales is specially designed, precision, high speed, stable and accurate. The signal line adopts multi-layer isolation steel and metal soft shell protection, waterproof and anti-interference fine. Easy to install and maintain, waterproof, dust-proof good, long service life. Widely used, high stabilization, capacity of resisting disturbance well. Suitable for JC800 data display instrument. Specification: Material: Metal Weight: 1277g/45oz Model: JC800 Accuracy: 5um Resolution: 5um Type: Grating Electronic Ruler Measuring Range: 0mm-400mm Linear Scales Size: 53.5*3.3*2cm/21.1*1.3*0.8inch Package List: 1 x Linear Scale Set (400mm) Note: 1. Please allow slight error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.