The F40-900.0-4-1.00 from CVI Laser Optics is a Optical Filter with Wavelength 750 to 1900 nm, Center Wavelength(CWL) 950 nm, Bandwidth (FWHM) 10±2 nm, Blocking Wavelength 3500 nm, Filter Diameter 50 mm. More details for F40-900.0-4-1.00 can be seen below.