Semperfli Peacock Quill Subs Multicard Fly Tying Synthetics - A multicard selection of artificial quills in different widths and black and green peacock substitutes. Peacock Quill Subs was designed to be particularly special in that it has that same amazing multicolor iridescence of natural peacock which is very difficult to reproduce in a synthetic material. The full range of Peacock Quill Subs is available in 5 different sizes, in black peacock or green peacock color options, from Extra Small which are perfect for Perdigons to wide 1.5mm (1/16in) Braid for streamers and salmon flies.