The J-45 is Gibson's best-selling acoustic of all time. Nicknamed "The Workhorse" and first introduced in 1942, this iconic acoustic has become the cornerstone of its round-shoulder, dreadnought line. World renowned for its full, balanced expression, warm bass and excellent projection, the 2016 J-45 has been refined to carry this legacy to new heights. Body Top Wood Species: Sitka Spruce Pieces: 2 Grade: AA Binding: 4 ply top Back Wood Species: Mahogany Pieces: 2 Binding: 1 ply Neck Wood Species: Mahogany Pieces: 1 Details Truss Rod: Single Action Profile: Slim Taper Thickness at Fret 1: 2.118cm / .83" Other Materials: Franklin Titebond 50, hot hide glue neck joint Average Weight: 408.23 gr / 14.4 oz Hardware Tuning Keys Style: Nickel Grover Rotomatics Weight: 46.72 gr / 1.648 oz Tuning Keys Details Tuning Ratio: 14:01 Plating specs: Nickel Part numbers: 140-130-620 String Dimensions E: 0.053 A: 0.042 D: 0.032 G: 0.024 B: 0.016 e: 0.012 Bridge Style: Belly up traditional Material: Rosewood with Tusq saddle Part number: 140-120-915, 140-130-866 Weight: 22g / .8 oz Output Jack Style: 6.35 mm / 1/4" mono Pickup Style: L.R. Baggs VTC