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20μm Precision Optical Slit Plate 304/316 Stainless Steel Unmounted Micro Slit, Find Details and Price about Precision Optical Slit Plate 20 Um Micro Slit from 20μm Precision Optical Slit Plate 304/316 Stainless Steel Unmounted Micro Slit - Shenzhen Xintu Precision Hardware Co., Ltd.