Specification Brand : AMNOUR BulletPoint1 : A set of 5 gratings with a size of 50*50mm and an observation hole size of 35*23mm are available in 5 types: single slit, double slit, triple slit, round hole, grid, and composite sheet. BulletPoint2 : Lens: The diffraction film is made of high-quality polycarbonate material, which can effectively improve image quality. BulletPoint3 : Applicable: interference diffraction plate, optical interference diffraction grating plate, optical experimental optical instrument. BulletPoint4 : This product should be used with light, the effect is very obvious. BulletPoint5 : Coating: Aluminum reflective + protective film Color : One Color ExternallyAssignedProductIdentifier : 3230361117995 ItemName : 5-piece interference diffraction grating plate diffraction film set optical experimental instrument single double triple slit ItemPackageDimensions_Height : 1 centimeters ItemPackageDimensions_Length : 3 centimeters ItemPackageDimensions_Width : 2 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : science-classroom-optics-kits Manufacturer : JTSF ModelNumber : JTSF9648 NumberOfBoxes : 1 NumberOfItems : 1 PartNumber : JTSF9648 ProductDescription : Material: plasticUsage: OpticalOrigin: MainlandCombination style: single seam, double seam, three seam, four seam: seam width 0.06mm, seam spacing 0.05mmMulti-line: 30 lines/MM, 60 lines/MM; round hole: hole diameter 0.36mm; triangle: side length 0.3mmSquare: Side length 0.2mm; Rectangle: Side length 0.6X0.28mm Size : One Size