Oak Classic (1Bis/RuA) unlimited sapwood

Classic (1 bis/RuA) - is a clean natural grade, sapwood and other color variations are allowed, this grade includes clear planks as well as planks with sound knots of light color max 25 mm dia., puttied and black knots max 15 mm dia., total number of knots 10 mm+ is max 2 per lm.