Taylor Premium Thermex Ruby Swirl Picks are the original Taylor DarkTone guitar pick, made with an exclusive thermo-bonding process designed to produce a richer, warmer guitar tone. Thermex picks are available in the classic 351 shape and are precision-cut in 1.0mm, 1.25mm and 1.5mm gauge sizes. Made in the USA. • MFSKU 70711 • UPC 887766100263