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| | 55.4150 |  | Fused Silica Windows |  | Windows |  | 25.0 mm. |  | 4 mm min. |  | Fused Silica Optical Grade 1, Index=1.4585; Polished Both Sides |  | QUOTE |  |
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| | 55.4155 |  | Fused Silica Windows |  | Windows |  | 25.0 mm. |  | 7 mm min. |  | Fused Silica Optical Grade 1, Index=1.4585; Polished Both Sides |  | QUOTE |  |
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| | 55.4175 |  | Fused Silica Windows |  | Windows |  | 40.0 mm. |  | 5 mm min. |  | Fused Silica Optical Grade 1, Index=1.4585; Polished Both Sides |  | QUOTE |  |
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| | 55.4200 |  | Fused Silica Windows |  | Windows |  | 50.0 mm. |  | 5 mm min. |  | Fused Silica Optical Grade 1, Index=1.4585; Polished Both Sides |  | QUOTE |  |
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| | 55.4225 |  | Fused Silica Windows |  | Windows |  | 50.0 mm. |  | 6 mm min. |  | Fused Silica Optical Grade 1, Index=1.4585; Polished Both Sides |  | QUOTE |  |
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| | 55.4250 |  | Fused Silica Windows |  | Windows |  | 75.0 mm. |  | 13 mm min. |  | Fused Silica Optical Grade 1, Index=1.4585; Polished Both Sides |  | QUOTE |  |
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| | 55.4275 |  | Fused Silica Windows |  | Windows |  | 102 mm. |  | 17 mm min. |  | Fused Silica Optical Grade 1, Index=1.4585; Polished Both Sides |  | QUOTE |  |
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| | 55.4300 |  | Fused Silica Windows |  | Windows |  | 152 mm. |  | 25 mm min. |  | Fused Silica Optical Grade 1, Index=1.4585; Polished Both Sides |  | QUOTE |  |
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| | 55.4325 |  | Fused Silica Windows |  | Windows |  | 205 mm. |  | 35 mm min. |  | Fused Silica Optical Grade 1, Index=1.4585; Polished Both Sides |  | QUOTE |  |
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| | 55.5010 |  | Fused Silica Windows |  | Windows |  | 50 x 50 sq. mm. |  | 1.5 mm min. |  | UV Grade Fused Silica, Polished Both Sides |  | $83.00 |  |
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| | 55.5020 |  | Fused Silica Windows |  | Windows |  | 25.4 mm. |  | 6.4 mm min. |  | Fused Silica Optical Grade 1, Index=1.4585; Polished Both Sides |  | QUOTE |  |
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| | 55.5050 |  | Fused Silica Windows |  | Windows |  | 50.8 mm. |  | 12 mm min. |  | Suprasil 1 UV Grade |  | $230.00 |  |