The 20W module uses compressed spot technology to reduce the focus to 0.08mm * 0.08mm,The engraving speed is faster, and the engraving accuracy is higher.Easily cut 5mm wood and 3mm acrylic.(Engraving speed: 500-3000, cutting speed: 0-250) The fixed focus distance is 20mm.There is a column in the package to adjust the focus convenient. Perfect for 1610 pro /3018/3018 pro/3018 MAX and most 2-axis Engraver Machine in the market. Equipped with high-quality aluminum heatsink and cooling fan, this can help the heat dissipate faster and the service life can be up to 10,000 hours Great tool for engraving wood,paper,leather, glass,acrylic, stainless steel et Material: Metal colour: black Package Contents: 1 set x cnc router Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.