Specification Brand : Carolina BulletPoint1 : Great for studying the properties of light or building a basic spectroscope BulletPoint2 : This linear diffraction grating film has 500 lines/mm and is provided as a 6 x 12" sheet. BulletPoint3 : When you shop with Carolina, you're not alone! All of our products are backed by unparalleled technical support, available from 8am to 6:30pm, ET, Monday through Friday. Live chat is available from 8am to 5:30pm ET, Monday-Friday. Contact information (Live Chat, email, and phone) is provided after placing your order at Amazon. BulletPoint4 : The lens can be disassembled freely, easier for children to understand and easy to clean. BulletPoint5 : Tube body setting, more convenient for children to grasp. Color : As Shown ExternallyAssignedProductIdentifier : 7596970251724 ExternallyAssignedProductIdentifier1 : 0840132658430 ExternallyAssignedProductIdentifier2 : 840132658430 ItemDisplayDimensions_Length : 2.32 centimeters ItemName : Diffraction Grating Film, Use To Study The Properties Of Light ItemPackageDimensions_Height : 0.39 inches ItemPackageDimensions_Length : 6.1 inches ItemPackageDimensions_Width : 5.31 inches ItemPackageQuantity : 1 ItemTypeKeyword : science-classroom-optics-kits Manufacturer : Carolina Biological Supply Company Material : ABS ModelName : Hilitandas2g4n6mi8 ModelNumber : 59C13K4Q0Q03A1 NumberOfItems : 1 PartNumber : 755227 ProductDescription : Great for studying the properties of light or building a basic spectroscope. This linear diffraction grating film has 500 lines/mm and is provided as a 6 x 12" sheet. ProductSiteLaunchDate : 2011-10-24T19:32:54.694Z Size : 5.90X1.90X0.60CM Style : Modern SupplierDeclaredDgHzRegulation : other UnitCount : 1