a: 111
b:

Thread, New England Quilt Supply

Thread

Catalog / Notions / Thread
Gurermann Invisible Nylon Thread, Black
Gutermann-252M-755
Gutermann Invisible Nylon Thread, Clear
Gurermann-252M-111
Sulky Invisible Polyster Thread-Clear
Sulky-232-0001-Clear
Sulky Invisible Polyster Thread-Smoke
Sulky-232-0002-Smoke
YLI Invisible Nylon Thread, Clear
YLI-4205-InvisibleThread-Clear
YLI Invisible Nylon Thread, Smoke
YLI-4206-InvisibleThread-Smoke