The BLACK + DECKER substitute yarn Reflex Plus A6440-XJ with rectangular cross section (wound) is suitable for different BLACK + DECKER trimmers, e.g. the models GL315, GL337, GL350, GL650SB, GL650SBK, GL650SZ, GL660P, GL680, GL680B, GL680BZ, GL690, GL701, GL701B, GL741 and GL5530.