Fiber Laser Lens 70×70-400×400 WaveLenth: 1064 nm Diameter: 50×50 mm 70×70 mm 110×110 mm 150×150 mm 175×175 mm 200×200 mm 220×220 mm 250×250 mm 300×300 mm 350×350 mm 400×400 mm sage: laser marking machine Structure: Plano-convex Material: glass Origin: China Certification: CE