{"product_id":"musical-instruments-instrument-accessories-string-instrument-accessories-string-instrument-strings","title":"Pirastro 1BLS Obligato Viola String Set, 4\/4 Medium","description":"\u003ch2\u003ePirastro Obligato Viola String Set, 4\/4 Medium\u003c\/h2\u003e\n\u003cp\u003eThe Pirastro Obligato Viola String Set supplies four medium-gauge strings for a 4\/4 instrument. A steel-core, aluminum-wound A pairs with synthetic-core D, G, and C strings. Silver windings cover the D and G, while tungsten-silver wraps the C. All four have ball ends, with a removable ball on the A.\u003c\/p\u003e\n\u003cp\u003eFor advancing students, orchestral musicians, and chamber players choosing full size viola strings, this package supplies every note for a complete replacement. Musicians seeking a medium gauge viola set receive a defined combination of core and winding materials. Manufacturer article number 421021 identifies the envelope-packaged configuration, helping players match their preferred replacement when ordering for practice or performance.\u003c\/p\u003e\n\u003cp\u003eThe lower three strings use synthetic multifilament cores, formed from multiple fibers beneath their metal windings. The A uses steel construction and offers attachment flexibility through its removable ball. Check your instrument's string-length requirements and tailpiece hardware before installation. Pirastro lists the gauge as Mittel, meaning medium, and provides individual article numbers for each string when a single-note replacement is needed later.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Four-String Replacement:\u003c\/strong\u003e Supplies A, D, G, and C together for a 4\/4 viola.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSteel-Core A:\u003c\/strong\u003e Combines steel construction with aluminum winding for the upper string.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSynthetic Lower-String Cores:\u003c\/strong\u003e Uses multifilament construction beneath the D, G, and C windings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSilver-Wound D and G:\u003c\/strong\u003e Pairs the middle strings with the same winding material.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTungsten-Silver C:\u003c\/strong\u003e Supplies the specified winding combination for the lowest string.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemovable A-String Ball:\u003c\/strong\u003e Allows the upper string's attachment to accommodate compatible fine-tuner hardware.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedium Gauge:\u003c\/strong\u003e Provides Pirastro's Mittel specification throughout the set.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Pirastro.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e Obligato.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Article Number:\u003c\/strong\u003e 421021.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDistributor SKU:\u003c\/strong\u003e 1BLS.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstrument:\u003c\/strong\u003e Viola.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 4\/4.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGauge:\u003c\/strong\u003e Medium \/ Mittel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eString Count:\u003c\/strong\u003e 4.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNotes:\u003c\/strong\u003e A, D, G, C.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA String:\u003c\/strong\u003e Steel core, aluminum winding, removable ball end; article 321121.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eD String:\u003c\/strong\u003e Synthetic core, silver winding, ball end; article 421221.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eG String:\u003c\/strong\u003e Synthetic core, silver winding, ball end; article 421321.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eC String:\u003c\/strong\u003e Synthetic core, tungsten-silver winding, ball end; article 421421.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackaging:\u003c\/strong\u003e Envelope.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's In the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOne aluminum-wound A string.\u003c\/li\u003e\n\u003cli\u003eOne silver-wound D string.\u003c\/li\u003e\n\u003cli\u003eOne silver-wound G string.\u003c\/li\u003e\n\u003cli\u003eOne tungsten-silver-wound C string.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Pirastro","offers":[{"title":"Default Title","offer_id":50788919214277,"sku":"PIRA-1BLS","price":180.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0630\/3085\/3829\/files\/1-pirastro-1bls_d576f761-fc03-4222-b9aa-1c81c2354b02.jpg?v=1792789415","url":"https:\/\/avlgear.com\/products\/musical-instruments-instrument-accessories-string-instrument-accessories-string-instrument-strings","provider":"AVLGEAR","version":"1.0","type":"link"}