Sustainability Guarantees Workers are paid a living wage; no child labour or human trafficking is involved in the production of the collection; the factory is compliant with all local environmental regulations. This collection is entirely made in the designer’s studio and/or by an artisan collective of fewer than 10 people. Style Notes TWINS ring with two balls made of steel and concrete will make an impression. Made of surgical steel and manually ground and polished concrete. Available in anthracite and grey. It comes beautifully packed in a Gravelli giftbox. Care & Info While the materials used are durable and stable, we recommend taking the ring off before washing hands or dishes, in order to avoid contact with soaps or detergents. Clean with damp soft cloth. High-quality surgical steel is mild on the skin and does not cause irritation, damage or allergies. Sizing Universal size that fits the following UK sizes: K, M 1/2, Q. Concrete ball diameter: 10 mm Weight: 4 g