MusicStringTheory.com - Music String Theory, provides strings and accessories for Violin, Viola, Cello, Double Bass, Acoustic Guitar, Classical Guitar, Electric Guitar, Electric Bass, Banjo, Mandolin, Dulcimer, and Ukulele. Website provides info. on when to change strings. Black Diamond Guitar Strings - Retailing coated guitar strings. Includes company history and information, catalog, and string care tips. Big City String Co. - Professional quality major brand guitar strings for acoustic, classical, flamenco and electric guitar. String This - Features a wide selection of unpackaged and packaged strings. Concord Musical Supplies - Violin, viola, cello, and bass strings. Musical supplies, instruments, and accessories. JustStrings.com - Large selection of musical instrument strings includes guitar, bass guitar, double bass, violin, mandolin, cello, viola, and banjo. Thousands of different sets available. Strings and Beyond - Elixir, Dean Markley and D'Addario strings and accessories. Also carries Gibson and Fender vintage guitars. Innovation Strings - Supplies double bass strings to musicians around the world. StringItUp - Large selection of musical instrument strings from a variety of manufacturers. Lord of the Strings - Strings for guitar, bass, banjo, mandolin and other musical instruments. Based in Austerlitz, The Netherlands. Ernie Ball - Acoustic, electric, classical and bass guitar strings. Galli Strings - Acoustic, electric, classical and bass guitar strings. Bernd Kuerschner - Offers strings for various instruments. Includes information about the care of strings and string selection, ordering information and product descriptions. Also offers custom made strings. Dirt Cheap Strings - Selling a variety of guitar strings online. Global Strings - Offers guitar, violin, banjo, mandolin, and ukulele strings. Includes company information and links to Canadian music artists. Strings By Mail - Online shop for guitar strings, violin strings, accessories, sheet music, and DVDs. Strings On Guitar - Provides colorful guitar strings for classical, acoustic, electric and bass guitars. SchneiderMusik - Offers a wide selection of strings for a variety of instruments. Cupertino Strings - US distributor website for Dogal Orchestral strings for violin, viola, cello, and contrabass. Superstrings - Supplier of instrument strings and accessories.