Fresnel Lens Magnifier, Diameter 100mm (4''), Focal Length 100mm, Acrylic Lens (not Glass), for Physics Classroom,Solar Heating,Magnifiying. (Focal Length 100mm) industrial The big opening makes for

The big opening makes for easy pouring of water

We constantly upgrade our products after reading customer's previous feedbacks

Spraying alcohol on the tape then it is easy to peel off

Super adhesive bubble free application

Bostitch Vertical Electric Pencil Sharpener

Fresnel Lens Magnifier, Diameter 100mm (4''), Focal Length 100mm, Acrylic Lens (not Glass), for Physics Classroom,Solar Heating,Magnifiying. (Focal Length 100mm) industrial The big opening makes forFresnel Lens Magnifier, Diameter 100mm (4''), Focal Length 100mm, Acrylic Lens (not Glass), for Physics Classroom,Solar Heating,Magnifiying. (Focal Length 100mm) 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)