Twickenham Solid Natural Oak Lacquered 90mm x 18mm Wood Flooring. A fantastic natural oak solid wood flooring. Each individual board is 90mm (9cm), the overall thickness of the plank is 18mm (1.8cm). The installation system on this product is tongue and groove, which would usually be fitted by gluing the planks together and using the glue down method to fix the boards to the sub-floor. The grade of this Oak is mixed, meaning it will contain some knots as is typical with Oak products. This product comes in mixed, random lengths. #flooringexperts #solidwood #flooring #oak #woodfloor #flooringdesign