Karri (also known as Western Australian Blue Gum) is a species of hardwood that is only found in Western Australia. Its appearance can vary from a rich reddish brown through to a pale pink in colour, and the timber typically contains interlocked grain.

In terms of staircases, Karri can be used for all components (including treads, risers, stringers, handrails, capping, balustrading and posts). Due to its deep colour and texture, it is also highly suited for staining.