The Longer B1 20W is an open-frame diode laser engraving machine with a 4-core laser head delivering 22–24W optical output and a 17.72×17.32 in (450×440mm) work area. It can cut 25mm basswood and 35mm acrylic by multiple passes, and is compatible with LightBurn, LaserGRBL, and the Longer app. Starting at $489.99. View on Longer →