Graef Polished Stainless Steel Double Walled Kettle WK81UK. GRAEF, a family company have stood for high-quality German made ergonomic & user-friendly products for over 50 years. Our impeccable range of durable, expertly engineered products are stunning, simple & superb to use. Their products are invented, developed, manufactured piece by piece & lovingly assembled by hand in the Arnsberg manufacturing centre in Germany.