Check the listing for details. Dunlop 418R114 Tortex Standard Guitar Picks 1.14mm Purple 72-pack. Color: Purple, Condition: New. Listed at 26.24 USD. Setting the Standard Since 1981 Originally designed to replicate the feel of a tortoiseshell pick, Dunlop’s Tortex line has since outgrown its iconic tortoise mascot, revolutionizing the world of guitar picks for over 40 years. Before Tortex picks came along, guitar players could only choose from a limited selection of plectrums that often came in only three ambiguous sizes: light, medium, and heavy. Jim Dunlop sought to provide a solution in arming players with a complete range of thickness standardized to the 100th of a millimeter, and easily recognizable by Dunlop’s signature color-coded system. Excellent durability, perfect grip, and snappy tone have made Tortex the industry-standard pick for guitar players around the world.