Series 1505 aka "The Miniaturist" is the highest quality short hair Spotter/Retouch brush available today. The Maestro designation denotes the highest quality winter male Kolinsky Red Sable hair from the Tobol River region in Eastern Siberia. Unsurpassed for photo retouch. Sizes 5/0 to 16. See da Vinci Series 5506 "Restauro" for a slightly longer length. Manufacturing from Germany.