Rectangular Refraction Block, 3" (75mm) x 2" (50mm) x 0.5" (12mm) - Optically Worked Glass - Slightly Beveled Edges - Excellent for Physics Experiments & Photography - Eisco Labs industrial_Oct2022 It's very safe even for

It's very safe even for children

and environmentally friendly

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ULTRA Grip

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Rectangular Refraction Block, 3" (75mm) x 2" (50mm) x 0.5" (12mm) - Optically Worked Glass - Slightly Beveled Edges - Excellent for Physics Experiments & Photography - Eisco Labs industrial_Oct2022 It's very safe even forRectangular Refraction Block, 3" (75mm) x 2" (50mm) x 0. 5" (12mm) Optically Worked Glass Slightly Beveled Edges Excellent for Physics Experiments & Photography Eisco Labs Product Features RECTANGULAR BLOCK Rectangular block made from imported optical glass with optically worked surfaces. All angles accurately worked with edges slightly beveled. Bubble free glass 3" LENGTH Block measures 3" long, 1. 5" wide and is 0. 5" thick PHYSICS EXPERIMENTS