The Godin Presentations back & sides are made of solid rosewood. Rosewood is a tone-wood of exceptional response and projection. A solid cedar top and semi-gloss Custom Polished finish round out the package. SF - Second Factory means that there's a very small flaw in the finish. From the ones we already received, these flaws are barely visible (and often not perceptible). Specifications Brand : GodinBack and Sides : Solid RosewoodTop : Solid Cedar TopNeck : MahoganyFingerboard : RosewoodFingerboard Radius : 24" (609.6 mm)Scale Length : 25.66" (651.764 mm)Nut Width : 2" (50.8 mm)Nut Type : GraphtechFrets : 19Machine Head Ratio : 14:1Bridge and Tailpiece : RosewoodColor : NaturalFinish : Semi GlossString Set : HTC NylonString Guages : .0285 .0327 .0410 .030 .036 .044Q1T : Not Included