DR Strings BKA-13 Black Beauties Black Colored K3 Coated Acoustic Guitar Strings Medium Gauge 13-56 bka-13 - Canada's Favourite Music Store - Acclaim Sound and Lighting
Coated vs. Uncoated Guitar Strings: What are the differences? – Ernie Ball Blog
D'Addario EXPPBB190GS Phosphor Bronze Coated Acoustic Bass Strings, Taylor GS Mini Scale, 37-90
D'Addario Coated Acoustic Strings - EXP16 – Fleet Pro Sound