So Fine! Thread #510 Grotto - Spool
is backordered and will ship as soon as it is back in stock.
So Fine! #50 is a #50/3 lint-free and extra smooth all purpose polyester thread. Each spool has 550 yards. Excellent for sewing, serger, bobbin thread and quilting.
Recommended for quilting and sewing. May also be used as bobbin thread.