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LASER TREE 40W 20mm Fixed Focus Laser Module with Protective Cover for Engraving Machine Wood Working Tools and Accessories| | - AliExpress
Amazon.com: Laser Engraver Module, 10W Output Power 450nm Laser Head with Air Assistance, FAC Double Ultra-Fine Compressed Spot, Compatible with DIY CNC Laser Engraver and Cutter Machine, 45mm Fixed-Focus, 12V