Fresnel Lens Magnifier, 200x200mm, Focal Length 210mm, Acrylic Lens (not Glass), for Physics Classroom, Solar Heating, Magnifiying, Fire Starter. (Focal Length 210mm) industrial_Oct2022 A variety of colors are

A variety of colors are available for all your needs

Ages 3 and under 5: 1/4 packet: Take 3 times after meals

The multi-cell and multi-layer design helps absorb shock and return impact energy

Bone's Therapeutics Drinking cup

and it is tough and durable

Fresnel Lens Magnifier, 200x200mm, Focal Length 210mm, Acrylic Lens (not Glass), for Physics Classroom, Solar Heating, Magnifiying, Fire Starter. (Focal Length 210mm) industrial_Oct2022 A variety of colors areFresnel Lens Magnifier, 200x200mm, Focal Length 210mm, Acrylic Lens (not Glass), for Physics Classroom, Solar Heating, Magnifiying, Fire Starter. (Focal Length 210mm) Size: 200x200mm, Focal length 210mm, 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 Square Fresnel Lens 200x200mm Focal length 210mm, Thickness: