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MCWlaser Si Reflection Mirror Dia: 19mm 20mm 25mm 30mm 38mm Thk: 3mm for 10.6um CO2 Laser Engraver Cutter 40W 50W 60W 80W 100W 130W 150W 200W
Material: Si coated golden
Dia:19mm/20mm/25mm/30mm/38mm optional ; Thickness:3mm
High reflective 99.2% ; Less loss of energy; Durable and long service life.$12.00