The strap is made of high-quality fluororubber, which is waterproof and dustproof, making it more comfortable and durable than ordinary rubber materials High quality stainless steel buckle, the buckle can open and close freely without any gaps Special interface: special curved interface, Compatible with Patek Philippe Aquanaut 5164A 5167A WatchBand Size: The watchband lug width is 21mm, and the watchband length is 225mm If you are unsure if your watch is compatible, please contact us and we will reply to you within 24 hours #7,197,373 in Clothing, Shoes & Jewelry ( ) #4,832 in #10,785 in