Strait Music - D'Addario ECG23 Extra Light Gauge Flatwound Electric Guitar Strings
Are there flat-wound strings for the classical guitar? - Quora
Thomastik-Infeld JF346 Jazz Nickel Flat Wound Round Core 6-String Electric Bass Strings Long Scale 33-136
Amazon.com - MIGONG 6 pcs Bass Guitar Strings, Colored Nylon and Color Coated Copper Alloy Winding Strings Portable Flatwound Bass Strings, Easy to Store and Use Flatwound Bass Strings for Bass Beginner
Flat Top Strings on a Flat Wound Guitar (And Vice Versa) - YouTube