Product Code: 5438Description: Minor AHRDioptres/Mag: 6D / 2.5xA x B x C: 134 x 174 x 19Lens Diameter: 83 x 64mmEffective Focal Length: 167.5mmField of View on Page: 180 x 150mm5438 (2.5x) Aspheric Hand MagnifierPart No:5438 Technical SpecificationsDescription: Minor AHR Dioptres/Mag: 6D / 2.5x A x B x C: 134 x 174 x 19 Lens Diameter: 83 x 64mm Effective Focal Length: 167.5mm Field of View on Page: 180 x 150mm