Specification Brand : CXCTCT BulletPoint1 : [HIGH-GRADE OPTICAL GLASS] Material: Crafted from high-grade optical glass with precision for durability and clarity. BulletPoint2 : [CRYSTAL CLEAR IMAGING] Clear Imaging: Achieve clear imaging with a focal length of up to -30.97, highly polished and precise. BulletPoint3 : [IDEAL FOR EDUCATION] Applicability: for physics classroom demonstrations on optics and light refraction. BulletPoint4 : [EDUCATIONAL GRADE OPTICS] Educational Devices: Utilize for fundamental research in geometric optics for educational purposes. BulletPoint5 : [PORTABLE AND CONVENIENT] Portable: Compact and lightweight design for easy portability, making it an excellent teaching aid for educators. ItemName : Concave Convex Lens Portable Small Clear Image Meniscus Lens Optical Glass Lens for Physics Teaching Classroom ItemPackageDimensions_Height : 3 centimeters ItemPackageDimensions_Length : 15 centimeters ItemPackageDimensions_Width : 8 centimeters ItemTypeKeyword : science-classroom-optics-kits Manufacturer : CXCTCT ModelName : SK-05_pack of 7 ModelNumber : CXCTCTfn38cpb07s NumberOfItems : 1 PartNumber : CXCTCTfn38cpb07s ProductDescription : [HIGH-GRADE OPTICAL GLASS] Material: Crafted from high-grade optical glass with precision for durability and clarity. [CRYSTAL CLEAR IMAGING] Clear Imaging: Achieve clear imaging with a focal length of up to -30.97, highly polished and precise. [IDEAL FOR EDUCATION] Applicability: for physics classroom demonstrations on optics and light refraction. [EDUCATIONAL GRADE OPTICS] Educational Devices: Utilize for fundamental research in geometric optics for educational purposes. [PORTABLE AND CONVENIENT] Portable: Compact and lightweight design for easy portability, making it an excellent teaching aid for educators. Spec: Item Type: Concave Convex Lens Material: Glass Model: AT022 Uses: Optical Appliances Focal Length: -30.97 Package List: 1 x Lens Note: