The F10-1000.0-4-0.50 from CVI Laser Optics is a Optical Filter with Wavelength 750 to 1900 nm, Center Wavelength(CWL) 1000 nm, Bandwidth (FWHM) 70±14 nm, Blocking Wavelength 3500 nm, Filter Diameter 12.7 mm. More details for F10-1000.0-4-0.50 can be seen below.