1.ATOMSTACK S20 Pro laser engraver is the first 130W semiconductor laser engraving machine. Also it is equipped with 32-bit motherboard, built-in 256-bit color scale and offline control terminal board. https://www.htpowlasers.com/collections/atomstackhttps://www.htpowlasers.com/collections/laser-engraver2.With a 32-bit motherboard works more smoothly and stable. The advanced built-in 256-bit color scale with 0.08 * 0.1mm laser spot area makes the engraved pattern more contrast and more obvious. the effect is more delicate and natural in the overlay of black and white. https://www.htpowlasers.com/products/powerful-atomstack-s20-pro-130w-quad-laser-engraver-20w3.With the most advanced 20W compressed spot makes cutting more powerful and faster. It can cut 15-20mm thick tung wood board and 8-10mm thick black acrylic board at one pass and easily cut more than 40 kinds of materials such as 0.05mm thick stainless steel board - new seller point (can cut metal sheet). https://www.htpowlasers.com/products/extension-kit-for-atomstack-s20-pro-a20-pro-x20-pro4.The S20 PRO is equipped with an upgraded F30 pro air assist kit, which have dual built-in air-assist pumps.