Natural air driedThe back is pre cut. You don’t need a bandsaw to cut the two halves.The thickness of each half back tapers from 7 mm at the lower bout to 19 mm at the joint edge.Pattern shown on the back is 350 x 110 mmThree side, each one 400 x 40 x 3 mm are coming with the set.Botanical name: Acer pseudoplatanusCommon name: European Maple or Sycamore MapleHarvested in Carpathian Mountains