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Hard crown glass, refractive index 1.519 to 1.523
Brass weights in a carrying rack.
Die casted, powder coated. These are excellent alternate of brass weights. These masses can be supplied in sets also.
Brass, plated.
A fantastic model of centenary arch made of fine quality wood. It consist 13 precision-cut wooden blocks and a wooden arch. All pieces can be assembled to make a Catenary Arch