... good surface quality 4. the competitive price 5. good reputation ir pass filter1.Material: Black Optical Glass (HWB760, HWB780, HWB800 ... into2 into4.Thickness business trip:±0.01mm±0.02mmThe ir pass filter can be used in infrared gas analyzer, ... products, infrared detectors, infrared receiver, infrared light, infrared sensor products, security cameras infrared night vision surveillance, such as police ...