Specifications:
--Diameter 74mm
--Height 27.2mm
--Edge Thickness:4mm
--Focal length: 48mm
--Light transmittance: 99%
--View Angle: 5~90 degree
--Material: optical Aspherical glasses
--Temperature:  -30-120°C
--Optical refractive index: 1.95%
--Light transmittance: 98%
--Scope of application: LED flashlight， LED auto lamps， LED lighting applications etc.