Screws Set 30Pcs for Red Dot Sight Optics and Mount Includes #4-40 in 6.35mm/7.5mm/8.5mm/9.52mm/11.11mm Length 5 Sets of Screws 6 in Each Set. Variety of sizes and sizes: This screw set is available in models #4-40 and is available in five different sizes including 6.35mm, 7.5mm, 8.5mm, 9.52mm and 11.11mm.
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