Specification AgeRangeDescription : Kid Brand : Hztyyier BulletPoint1 : This round concave glass mirror is designed for physics and educational uses. BulletPoint2 : It is approximately 1.5" (38mm) diameter and 2mm thick. Note, thickness varies as they are not designed to be consistent in that respect. BulletPoint3 : Because of their educational use design, there may be minor imperfections that do not affect physical function. BulletPoint4 : 100mm Focal Length CustomerPackageType : Standard Packaging EducationalObjective : Observation Skills ExternallyAssignedProductIdentifier1 : 738588536832 ExternallyAssignedProductIdentifier2 : 0738588536832 ExternallyAssignedProductIdentifier3 : 00849230042547 ItemName : Hztyyier High Transparent Convex Concave Mirror Triple Prism with Stand Optical Experimental Tool for Teaching Light Spectrum Physics(Convex Mirror) ItemPackageDimensions_Height : 21.3 centimeters ItemPackageDimensions_Length : 2.3 centimeters ItemPackageDimensions_Width : 12.2 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : science-classroom-optics-kits Manufacturer : Hztyyier Material : Glass ModelNumber : PH0519B MountingType : Tabletop Mount NumberOfItems : 1 NumberOfPieces : 1 OperationMode : Manual PartNumber : Hztyyierx3z1agtd4s-03 ProductDescription : Specification: (Optional): Convex Mirror:Diameter with Holder:100mm/3.94in;Mirror Diameter:10cm/3.94in Concave Mirror:Diameter with Holder:100mm/3.94in;Mirror Diameter:10cm/3.94in Triple Prism: Length:80mm/3.15in Component:Mirror/Frame/Pedestal