Know your wood: Utile The picture at left shows just a swatch of straight-grained Utile, or Sipo lumber, via The Wood Database. Common trade names: Utile, Sipo, Sipo Mahogany, Genus: Entandrophragma utile Janka Hardness (pounds-force): 1260 Description: Similar in look and performance to mahogany, (and even trade named a mahogany—this is not a mahogany, but […]