The LMS-254-R1025-R3000-BK7 from Castech Inc. is a Optical Lens with Wavelength Range 589 nm, Focal Length 300 mm, Center Thickness 4.02 mm, Diameter 25.4 mm (1 Inch), Radius -300 mm, 102.58 mm. More details for LMS-254-R1025-R3000-BK7 can be seen below.