Galleria Heritage European Colonial Oak 150mm Oiled Solid Flooring is 150mm wide, has a total thickness of 20mm & comes in random lengths of between 400-2000mm, with around 20% of the boards being 2000mm long. Although this is a solid wood flooring all the way through it still has a wear layer above the tongue & groove, sanding cannot surpass this point. On this floor that wear layers is 8.0mm which if need can be sanded & re-finished up to 10 times, but under a normal maintenance program & in a domestic environment the floor should not need to be sanded for around 20 years. The floor is constructed like a traditional hardwood floor out of one piece to timber. Each of the planks has bevelled edges (V Grooves) on all four sides resulting in very distinctive groove between the planks, adding more depth & dimension along with giving an individual definition to each plank. The rustic grade of this hardwood is a very vibrant colourful floor full of character & excitement. The floor can display heavy grain markings, figuring, mineral streaks, colour variations, sapwood & frequent knots of varying sizes. Knot holes, checks splits & other imperfections are allowed, filled & finished. The floor is prefinished with natural oil which adds a deep warm natural feel to the floor. This seemingly transparent surface enhances the natural grain & structure of the wood, allowing its natural beauty to show whilst still offering a deep protection.