The F40-450.0-4-1.00 from CVI Laser Optics is a Optical Filter with Wavelength 400 to 749 nm, Center Wavelength(CWL) 450 nm, Bandwidth (FWHM) 40 ± 8 nm, Blocking Wavelength 1200 nm, Filter Diameter 50 mm. More details for F40-450.0-4-1.00 can be seen below.