{"product_id":"graph-tech_prn-3422-n0","title":"Graph Tech - 3+3 Ratio Acoustic Guitar Machine Heads Butterbean Open Back - Nickel","description":"\u003cp\u003eRATIO® patented gear technology\u003cbr\u003e\nCalibrated Machine Heads incorporate different string gauges into the tuning equation. Graph Tech balanced the gear ratios to each string simplifying the tuning process...with RATIO®, a half-turn is a semi-tone! Every string reacts the same to any tuning adjustment. Predictable, precise tuning, on every string. The PRN-3422 is a right-handed set of open-back RATIO® Calibrated Machine Heads for acoustic guitars that use 3+3 side tuners.\u003c\/p\u003e\n\n\n\u003cp\u003eSpecifications\u003cbr\u003e\n- Gear ratio: unique for each string position - one turn-one tone\u003cbr\u003e\n- Peg holes diameter required: 0.346\" (8.8mm)\u003cbr\u003e\n- String post diameter: 0.236\" (6mm)\u003cbr\u003e\n- String post length to string hole: 0.827\"; (21mm)\u003cbr\u003e\n- Weight per single machine head: 0.055lbs (25g)\u003cbr\u003e\n- Weight per set of six: 0.331lbs (150g)\u003cbr\u003e\n- String diameter up to 72 gauge\u003cbr\u003e\n- Includes 6 machine heads, mounting screws, and bushings\u003c\/p\u003e","brand":"Graph Tech","offers":[{"title":"Default Title","offer_id":45868634538137,"sku":"PRN-3422-N0","price":215.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0694\/6799\/6313\/files\/md_c65a17b00828fc0fa27e65bf5bb16377.webp?v=1762535182","url":"https:\/\/metronomie.com\/en\/products\/graph-tech_prn-3422-n0","provider":"Métronomie","version":"1.0","type":"link"}