Poly Latch Wire is one part of an ingenious system for easily securing greenhouse film, shade cloth, and other fabrics onto high tunnels and other structures. Quickly install this uniquely shaped, heavy-duty steel wire into the Poly Latch Channel to reliably hold coverings in place, even with wind and snow loads. Does not damage greenhouse films, even with repeated use over several seasons. Pieces sold individually. 1 Unit = One 4 ft. section. NOTE: Poly Latch Channel sold separately. See part #7041.