1.Size can be customized 2.Treat procedure 3.Sorts of wood for choose sort of wood :Russian pine/European red pine/Mongolian pine Imported timber,Canadian hemlock,red cedar,Finland spruce white pine etc.Sauna board for sauna room,sauna wall board,bench board,floor board,ceiling board,sauna house board,hot tub gazebo board,hot tub enclosure board,antiseptic timber etc.