Specifications: (2 pcs are included in the package) Product:Narrow Bandpass Filter Type:NBP940 (940nm) Size:8x8mm Thickness:0.55mm CWL:940nm±5nm Bandwidth:30-40nm Transmisison Rate:350-900nm T<1% ,980nm-1100nm<1% It means that the filter will pass some visible light.The visible light can't be cut totally! Please note this .Thank you. About Customization: We are producer.Size can be customized with good price. Find us: Shijiazhuang Tangsinuo Optoelectronic Technology Co.,Ltd.
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