Contains: 1 Pair of housing shields, 2 combined single and triple slit plates, 2 multiple slit combs, 2 holders for combs and slit plates, 4 wooden light barriers, 4 Plano cylindrical lenses + 7 D, 2 Plano cylindrical lenses +10 D, 2 Plano cylindrical lenses +17D, 2 Plano cylindrical lenses -17 D.
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