Regal RD-30V Series Studio Resonator Guitar Roundneck, All-mahogany construction Mahogany neck with adjustable truss rod, Rosewood fingerboard with M.O.P dot position markers White plastic bound body and bound fingerboard, vintage sunburst finish 1.75 Inches nut width - Roundneck, Rock maple saddle & bone nut Spun 10.5 Inches aluminum cone, 4 Internal sound posts, Open-back, butterbean buttons, nickel-plated tuners, Nickel-plated parts