455nm 5W/20W Focal Adjustable High Power Laser Engraving Module has three models: Basic, Standard and Pro. We test each laser module with the optical power meter before shipment to ensure the optical output efficiency is more than 97%. The beam taper has smaller symmetrical taper. The Standard and Pro models have more than 2000 hours test data so they have high reliability. The Pro model owns remarkable beam size and cutting ability. Not only it can engrave on mirror finished stainless steel, but also can cut trough 4mm thick plywood one time.
For more details, please go to:https://www.ebay.com/itm/174340944828
455nm 5W Focal Adjustable High Power Laser Engraving Module with TTL
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