Simply replace the Y axis to quickly expand the working area of the laser engraver Bl 20W/30W/40wexpanded from 450*440mm2 to 450*850mm2 Extension Kits for Longer Laser B1 Stable structural design ensures high-quality engraving and cutting even at maximum speed and large area. Suitable for large-area creation and batch creation to achieve higher work efficiency. The extension rod and cable have been rigorously tested to ensure the same accuracy and stability as the standard Bl engraver, thus ensuring high-quality engraving and cutting