Fit for SINGER sewing machine models:
29-4 29K1 29K2 29K3 29K4 29K10 29K11 29K12 29K13 29K14 29K15 29K16
29K17 29K18 29K21 29K22 29K23 29K30 29K31 29K32 29K33 29K51 29K53 29K56 29K58
29K71 29K72 29K73 29U171A, 29U172A, 29U173A