V-Rib: Cascade first introduced this item 39 years ago. It has been copied and renamed such as Body Glass. There have been more nymphs and "Crazy Charlie's" tied with this product than any other lacing material. Flat on one side, oval on the other. The original "V RIB." 3 Yard package. Sizes: Small #18 to-#14, Medium #14 to #8, Large #8 to 4/0.