This Genuine as new Rubber B for Patek Philippe Nautilus Gray Watch Strap is a high-quality two-piece wristwatch strap designed specifically for the Patek Philippe Nautilus model. Made from durable rubber, this strap is 25mm wide and comes in a grey colour to match the grey white gold of the watch case and dial making it a practical and stylish choice for any Patek Philippe watch owner looking to replace or upgrade their strap. This watch band is not compatible with the models on a steel or gold bracelet. This strap is only compatible with the models which come on a leather/crocodile strap. Please see my other Nautilus straps and watches.