Fresnel Lens Magnifier, Diameter 100mm (4''), Focal Length 50mm, Acrylic Ultrathin Lens for Physics Classroom,Solar Heating,Magnifiying. (Focal Length 50mm) Size:Focal length 50mm These handy and hardworking accessories

These handy and hardworking accessories expose clean

The replacement caulk nozzle applicator can be used in baseboard caulking

and continues to strive for perfection

so you can choose one that complements or matches your car

Fresnel Lens Magnifier, Diameter 100mm (4''), Focal Length 50mm, Acrylic Ultrathin Lens for Physics Classroom,Solar Heating,Magnifiying. (Focal Length 50mm) Size:Focal length 50mm These handy and hardworking accessoriesFresnel Lens Magnifier, Diameter 100mm (4''), Focal Length 50mm, Acrylic Ultrathin Lens for Physics Classroom,Solar Heating,Magnifiying. (Focal Length 50mm) Size: 100mm Thickness: 2mm Material: PMMA (acrylic) Groove pitch: 0. 5mm Transmission (%): 92 (from 400 1100nm) Index of Refraction nd : 1. 491 Operating Temperature (C): 80 (Maximum) Product Features 1 Pack Round Fresnel Lens Magnifier Size: 100mm, Thickness: 2mm, Material: PMMA (Acrylic) High