Feature:1. The principle of automatic focusing of the pen to control the automatic lifting and falling of the Z-axis to adjust the focal distance, matched to the lighting head used together. 2. Mounting hole diameter 24 MM, 25 MM, saving the hassle of manual focusing. 3. Used for CO2 automatic electric engraving machine on upper and lower working table. 4. Made of high quality steel, sturdy, durable and long service life. 5. Professional production, stable characteristics and high reliability. . Engraving Machine Automatic Sensor Item Type: Focus Sensor Material: stal Colour red Quantity: 1 piece Power supply method: direct current Application: used for engraving cutting machine Feature: Durable Optional mounting hole size: ok. 24mm/0.94in, 25mm/0.98in . Engraving Machine Automatic Sensor Package List:1 x Engraving Machine Focus Sensor . Engraving Machine Automatic Sensor