Made with Breathable, Top Grade First Layer Genuine Calf LeatherHigh-Quality Pure Solid 316L Stainless Steel Silver Single Press Butterfly ClaspFeatures:1. Only the best and high-grade materials were selected and processed under strict quality controls.We use high-quality top layer Genuine leather for this strap which owns its silky shine through matte finish.Moderate padding and premium leather provide maximum breathability, comfort and style.2. With tool and 2pcs Spring Bar and box Packing: Easy to swap watch straps in seconds.3. It's classical design style and made for your luxury watches. It can be applied to watches with standard straight lug ends,such as Tissot, Longines, IWC, Rolex, Mido, Omega, Armani, Cartier, DW, Tudor, Movado, Rado, Hamilton, Titoni, Certina, Calvin Klein, Swiss Military, MontBlanc, Girard-Perregaux, Carl F.Bucherer, Armani, Kronsegler, Jaeger, Invicta, Zenith, Ranceas, Timex, DAVOSA, Oris, etc.4. Every watch band has a width number, which can help you to choose the correct watch strap.Specification:Band materials: Top layer Genuine LeatherButterfly clasp material: Stainless SteelBand Color: Black, BrownButterfly clasp Color: SilverPattern: Bamboo grainSize: 16mm,18mm,19mm,20mm,21mm,22mmPackage includes:1 X Genuine Leather Watch Strap1 X Watch Band tool2 X Lugs