ELIXIR POLYWEB 11050 80/20 ACOUSTIC GUITAR STRINGS. 12-53.12 53 E11050 POLYWEB CUSTOM LIGHT ACOUSTIC GUITAR STRINGS. Elixir Strings 80 20 Bronze Acoustic Guitar Strings with POLYWEB Coating, Light (. 012 . 053) E11050 Acoustic guitar strings constructed with 80 20 (80% copper, 20% zinc) bronze wrap wire Played for a warm and robust tone that sounds "played in" but still retains a remarkably clear mid range