a: 111
b:

Thread, New England Quilt Supply

Thread

Catalog / Notions / Thread
Gutermann Invisible Nylon Thread, Black
Gutermann-252M-755
Gutermann Invisible Nylon Thread, Clear
Gurermann-252M-111
Item currently out of stock
Sulky-232-0001-Smoke
Sulky-232-0001-Smoke
YLI Invisible Nylon Wonder Thread, Clear
YLI-4205-InvisibleThread-Clear