Prism, with different angle 25 x 25 x 130degree, Optical Borosilicate Crown glass having R.I. 1.510 App. Optically worked for use with Spectrometer, Equilateral, two facespolished 32 x 32 mm height.Double Extra Dense Flint R. Index 1.71-1.74, Weight (lb): 1.3, 6.3x6.3x3.9in
Rectangular Block - Glass, Made from imported optical glass with optically worked surfaces, All angles accurately worked with edges slightly bevelled and glass free from bubbles, Size 75 x 50 x 12 mm
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