Stone Brown. Engineered Chevron Oak Flooring Thickness: 16 mm or 21 mm Top layer: 4 mm or 6 mm European Oak Widths: 100 mm, 120 mm, 140 mm or bespoke Lengths: 490 mm, 560 mm, 720 mm or bespoke Grades: Rustic, Classic, Select Suitable with underfloor heating Wooden flooring supply and install within the mainland UK.