Specification Brand : BEXCO BulletPoint1 : Image Mag.2.97X, Aperture 48mm,Working Distance 47mm BulletPoint2 : Sterilizable, Perfect equilibrium of magnification and field of view. Perfectly corrected for field curvature, astigmatism, aberrations and coma. BulletPoint3 : Supplied in wooden case BulletPoint4 : 20D Lens provides an extended working distance from cornea. BulletPoint5 : 【One-year warranty】Provides a one-year warranty period. When there is a problem with the product, you will be provided with parts and solutions. Color : Black CompatibleDevices : Telescopes ExternallyAssignedProductIdentifier : 4850172348099 ExternallyAssignedProductIdentifier1 : 0884281231960 ExternallyAssignedProductIdentifier2 : 884281231960 IncludedComponents : body ItemName : 20D Black Clear Double Aspheric Lens Ophthalmology Equipment Accessories ItemPackageDimensions_Height : 43 centimeters ItemPackageDimensions_Length : 28 centimeters ItemPackageDimensions_Width : 30 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : professional-medical-ophthalmoscopes LensDesign : Prime Manufacturer : BEXCO ModelName : Welch Allyn 72800 ModelNumber : 20DLblack NumberOfItems : 1 PartNumber : 20D Double Aspheric Lens Black ProductDescription : 20D Classic BIO Lens :- Industry standard general diagnostic lens Features & Benefits:- Double aspheric glass optics provide Clear imaging. High magnification provides excellent views of the optic. Perfectly corrected for field curvature, astigmatism, aberrations and coma. Specification:- Lens Field of View Image Mag. Aperture Working Distance 20D 500 2.97x 48mm 47mm ProductSiteLaunchDate : 2017-04-20T07:00:00.000Z RecommendedUsesForProduct : Scooter Reusability : Rechargeable SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredHasProductIdentifierExemption : 1 UnitCount : 1 Voltage : 2.4 volts