Havana wide oak boards feature a slightly “burnt” finish effect. In either solid oak or engineered versions, with its surface hand-aged to really look and feel like worn old “undulating” floorboards. Tongued & grooved, ready to install. Solid oak board widths: 14cm to 20cm. Mixed lengths. Thickness 18mm to 20mm. Engineered oak: board widths 14cm, 18cm and 21cm. Mixed lengths. Thickness 15mm.