【Refurbished】AtomStack Laser Engraving Area Extension Kit for A40 Pro V2Features: Quickly and conveniently expand the engraving size: just replace the frame shaft of the AtomStack series engraving machine you can get a large engraving area of 800*400mm without purchasing any additional accessories to meet your large area engraving needs. High precision original profiles of the same color: The expansion kit adopts the original metal profiles of the same color as the A40 Pro V2 engraving machine which expands the engraving