2-piece European Maple (A. pseudoplatanus) Violin/Viola back. Master Grade. Beautiful wood.  Matching ribs included.   Viola outline shown is about 245mm at lower bout. Cut 2018.  Note that this back set has a width of 275mm and a length of 450mm.  The included ribs are 455mm long (4) and are 50mm wide. Min. Billet Dimensions: 26mm x 11mm cross-section (each side) 137mm wide x 450mm long (overall dims)