Specification Brand : Raguso BulletPoint1 : Optical Glass Material: Meniscus lenses are made of high grade optical glass with high accuracy. BulletPoint2 : Educational Devices: Educational grade optics for fundamental research in geometric optics. BulletPoint3 : Clear Imaging: The focal length can up to 39.6, the imaging is clear, highly polished, and edged. BulletPoint4 : Portable Mini: Small size, light weight, easy to carry, excellent teaching aid for teachers. BulletPoint5 : Applicability: This optical lens is ideal for physics classroom demonstrations of optics and light refraction. ExternallyAssignedProductIdentifier : 7029248785107 ItemName : Optical GlassLens, Clear Imaging Meniscus Lens Optical Appliances Educational Devices Portable for Physics Classroom ItemPackageDimensions_Height : 3 centimeters ItemPackageDimensions_Length : 6 centimeters ItemPackageDimensions_Width : 6 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : video-projector-lenses Manufacturer : Raguso Material : Glass NumberOfItems : 1 PartNumber : Ragusozh903be15n663 ProductDescription : Feature: 1. Optical Glass Material: Meniscus lenses are made of high grade optical glass with high accuracy. 2. Educational Devices: Educational grade optics for fundamental research in geometric optics. 3. Clear Imaging: The focal length can up to 39.6, the imaging is clear, highly polished, and edged. 4. Portable Mini: Small size, light weight, easy to carry, excellent teaching aid for teachers. 5. Applicability: This optical lens is ideal for physics classroom demonstrations of optics and light refraction.