Fresnel Lens Magnifier, Diameter 150mm (5.9''), Focal Length 140mm, Acrylic Lens (not Glass), for Physics Classroom Education, Solar Heating, Magnifiying. (Focal Length 140mm) auspowers_batchthree to reduce swelling

to reduce swelling

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They give you maximal options for wrapping various types of adult and children’s injuries

Green/Safe/ Harmless materials for children

Battery compartment also provides a handy internal storage space for the wireless USB nano receiver when not in use

Fresnel Lens Magnifier, Diameter 150mm (5.9''), Focal Length 140mm, Acrylic Lens (not Glass), for Physics Classroom Education, Solar Heating, Magnifiying. (Focal Length 140mm) auspowers_batchthree to reduce swellingFresnel Lens Magnifier, Diameter 150mm (5. 9''), Focal Length 140mm, Acrylic Lens (not Glass), for Physics Classroom Education, Solar Heating, Magnifiying. (Focal Length 140mm) Size: ? 150mm Thickness: 2mm Material: PMMA (acrylic) Transmission (%): 92 (from 400 1100nm) Index of Refraction nd : 1. 491 Operating Temperature (C): 80 (Maximum) Product Features 1 Pack Fresnel Lens 150mm Focal length 140mm Thickness: 2mm, Material: PMMA (Acrylic) High Light