For over four centuries brass has been the core of Skultuna. Brass is an alloy made of copper and zinc. The most important production techniques used to produce Skultuna products are sand casting, pressure die casting, turning and metal spinning. The surface is then worked worked upon until a golden, mirror like finish is reached with techniques like blasting, sanding, grinding and brushing.

The Karui trays are designed by GamFratesi for Skultuna. The trays are made using metal spinning, a classic Skultuna production technique. The leather comes from the leading Swedish tannery ,Tärnsjö, famous for their high quality leather and located close to Skultuna in Sweden.

The Karui trays are polished brass with a leather insert on bottom surface of the interior.