Give your Rolex Explorer I 40mm the strap it deserves. Our Curved End Rubber Strap is tailor-fit to your Explorer's dimensions: seamlessly hugging the case and lugs. Featuring FKM vulcanized rubber and a 316L stainless steel tang buckle, this strap is built with durability and comfort in mind. This strap is compatible with the Explorer I 40mm reference 224270.