产品特点：Two way extension. 产品优势：Customizable, multiple materials, multiple color, GSG certified. 48 hours salt spray test. 50000 cycle test
53mm 滚珠滑轨
53mm 滚珠滑轨带锁ver2
53mm 滚珠滑轨带锁
51mm 滚珠滑轨
53薄款
53缓冲
76带锁
76普通
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