Made Top high quality nature rubber ,environmentally friendly and healthy,Softness is moderate, wear very comfortable. suitable for Rolex fit for Rolex Yacht-Master 40mm,Daytona,Submariner 40mm,GMT-Master 40mm,Sea Dweller 40mm,Air-King 40mm,datejust 36mm,Day-Date 36mm/40mm,Cellini 39, Explorer 39mm/40mm,Milgauss 40mm,Oyster Perpetual 39mm,1908, not fit Sky Dweller. This Watchband is also fit for other brands of watches with a 20mm lug width, such as TUDOR,IWC,Longines ,Omega/Seiko/CITIZEN, etc WHAT YOU GET: 1 x Watch Band, 1 x TooL, 3 x Spring Exquisite craftsmanship and stylish design are perfect gifts for friends and family. If you have any problems, please feel free to contact with us. We are very happy to help you.