The CLB-1070-20PM from Laser 2000 (UK) Ltd. is a Optical Lens with Wavelength Range 400 to 700 nm, Focal Length 2 cm(20 mm), Center Thickness 3 mm, Radius 1.038 cm(10.38 mm), Edge Thickness(ET) 1.7 mm. More details for CLB-1070-20PM can be seen below.