... robot High efficiency Diode laser source, high stabilit laser machine for welding:Features: Power of the laser can be djustable LCD ... 30W, 60W, 90W Power instability <5% Fiber Core diameter 50µm, 100µm, 200µm, 400µm, 600µm ... Fiber connectors SMA905 Minimum beam spot 50µm to 400µm Pulse duration 1-9999ms; customization ... optics 1:1 imaging optics Working distance 50mm Laser machine for welding