This product is a set of 12 diamond-shaped crystal glass cabinet knobs, measuring 30mm in size. The knobs are made of aluminum with a polished finish, giving them a sleek and modern look. They are designed for use on cabinets, cupboards, and wardrobes, and come with screws for easy installation. The knobs are durable, ambidextrous, and easy to install, making them a practical and stylish addition to any home decor.