Actual product many very based on size and options selected.
Brand:
UNI Products
Model:
BigFly Thread
Model Item Selector
Narrow your selection by clicking options.
The options will update based on your selection.
Click the to clear your selection.
Price: $3.89 
(depends on options selected above)
Description
Designed specifically for big saltwater flies, bass bugs and other tying applications where a very strong, easily-handled thread is necessary. Same material (polyester) as UNI 6/0 & 8/0 so it won't dull fly-tying scissors. 4 times stronger than a 6/0 thread and four times bigger too... Untwists quickly and easily for flat-thread applications.
Buy on-line or talk with a knowledgeable fly fishing specialist: