Walnut plank in 3-layer construction with small bevel on long side and approx. 4 mm top layer, with approx. 4 mm backing in the same wood and middle layer conifer. Tongue and groove on all sides for easy installation. Sapwood up to 1/3 of plank width, healthy knots up to max. 40 mm diameter, also some repairs up to max. 25 mm diameter and spot fillings are permitted. Samples can always only show the character of a specific wood.