Midge for hook size 16-20, Nymph hook size 12-16, Medium hook size 6 -12, Large hook size 1-8 (selected colors)This material is similar to the V rib and Larva Lace except that it is shaped like the letter “D”. This shape provides a distinct segmentation when wrapped on a hook shank. D Rib is a solid material with considerable stretch allowing the tieing of flies down to size 24. Colors: Clear, Yellow, Orange, Gray, Copper, Tan, Brown, Wine, Red, Green, Olive, Purple, Black, Amber, Rust, Shrimp Pink, Fluorescent Pink, and Fluorescent Chartreuse. Item# 1408