Optical Diffraction Grating Set 5pcs with Various Seam Widths and Types
18,46 €
The side length of the square is 0.2mm, and the side length of the rectangle is 0.6 0.28mm. Single seam: seam width is 0.05, 0.1, 0.2m, three types. Double seam: seam width is 0.05M, spacing is 0.2, 0.3, 0.45mm.
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