UNI-TRANSLUCENT CLEAR-MONO - Tying Thread is strong. Perfect for tying shrimp & squid patterns. Ribbing scuds or wrapping midge bodies. Pal Bobby Popovics "over-coats" it with epoxy, and the thread disappears. Size "Fine" is 8/0 diameter with 4/0 strength). SIZES: (1)Fine, (2)Medium (per spool)