C500 Car HUD Virtual HD Projection Head-up Display, With Adjustable Reflection Board, Speed & RPM & Water Temperature & Oil Consumption & Driving Distance / Time & Voltage Display, Over Speed Alarm, Connect OBD2 Interface(Green) Filter-Access Controller Small washer inner diameter: 21mm

Small washer inner diameter: 21mm

so it will not break

Using environmentally friendly plastic

It is easy to pops a dent with the detailed repair steps described in the manual

C500 Car HUD Virtual HD Projection Head-up Display, With Adjustable Reflection Board, Speed & RPM & Water Temperature & Oil Consumption & Driving Distance / Time & Voltage Display, Over Speed Alarm, Connect OBD2 Interface(Green) Filter-Access Controller Small washer inner diameter: 21mmSpecification: General Certificate ROHS , FCC , EMC Model C500 Display Type Color LED Barometric Press 86 106KPa Work Environment Work Temperature 40 to 80 degree celsius Relative Humidity 10 95 percent Environmental Noise 60db and below Dimension Size 135*68*30mm Package Weight One Package Weight 0. 31kgs 0. 67lb One Package Size 16cm * 11cm * 7cm 6. 3inch * 4. 33inch * 2. 76inch Qty per Carton 60 Carton Weight 17. 60kgs 38. 80lb Carton Size 57cm *