SINGER SEWING MACHINE SPOOL PIN + RED FELTS
Vertical Push in spool pins with a Taper end type
Just Tap the tapered end into the hole in the top of the machine
Fits Many older singer models -
327,328,329,337,338,347,348,403,404,413,416,418,457,466,477,478,502,507,509,513,514,518,522,527,533,534,538