AB Grade delivers a stunning visual experience - Less knots and natural features, for cleaner look. Hardwood Collection is created using two majestic Northern Hemisphere temperate hardwood species, American Red Oak, and White Ash from Central Asia. These two hardwood species are used extensively throughout Europe and North America due to their natural beauty and performance characteristics. There are 12 gorgeous colours that best fit the individual colour and grain patterns of Red Oak & White Ash. The engineered planks feature a High � Spec AB grade to deliver a stunning visual appearance that enhances the unique features of these two majestic species.