1). 75S 5mm 4 X 5mm/ X 3, 2). 75G 10mm, 4 X 10mm/ X 3,3). 50S 5mm 4 X 5mm/ X 3, 4). 50G 4 X 10mm/ X 3, 5). Lifetime ? 10000h6). 50W lifetime ? 6000h7). Usage: Laser Marking, Thin metal cutting, Laser processing8). Features: High Conversion Efficiency, High Reliably structure, Compact, simple package, Long life-time ? 10000h