Manufactured by Motilal Dulichand Ltd. in India, this unwaxed thread is thicker than Colophons Best Linen Thread and comes in longer spools. Available in Natural and White. 

Known for its strength, durability, and beautiful sheen, flax linen has been bookbinders’ preferred thread fiber for centuries. 

16/3 available in 100 and 250 meter spools 
18/5 no longer available

Unsure which thread you need? Sample cards can be found here.

If you’re curious to know more about number system used to describe thread sizes, check out this post by book conservator and toolmaker Jeff Peachey.