Material: Platinum-coated stainless steel. Include: 5 razors Size: 45 x 25 mm Height: 48 g How to use and store Use: Place the razor blade in the razor. These razor blades are universal, meaning they can be used with any razor. How to store: Rinse with water after every use and leave to dry in a cool, dry place. How long does it last? 3-5 days with daily use. Packaging: 100% recyclable cardboard packaging. Waste: 100% recyclable at a recycling centre.