The rail package contains the following items:
1  Document
2  Left rail
3  Right rail
4  Nine M5 screws (for square-hole and round-hole rack)
5  Nine cage nuts (for square-hole rack)
6  Nine clip nuts (for round-hole rack)
7  Nine 10-32 screws (for threaded rack)
8  Nine 12-24 screws (for threaded rack)
9  Four screws
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