AixiZ Multi-Focal Laser Glass Lens with multi-coating for 400-700nm, great penetration rate for blue lasers and red, 9mm in diameter for AixiZ 12mm laser module housing. AixiZ Version of the G2 lens. 9mm Glass Lens for 400nm-700nm Plating 400-450nm AR coating, M9 * P0.5 thread, length 10mm Lens Specifications EFL: (effective focal length) 4.02mm SD: (diode to the lens distance) 5.3 CA: (effective aperture) ¢ 5 M: (thread diameter) M9 * 0.5