Unique production process: using hand brush-off technology. the leather color of watch straps shows a gradual effect. which increases the layered and Stereoscopic sense of leather. making your watch look more retro and personalized. which is the biggest bright point of the watch strap. Because it’s hand brushing off. the pattern of gradual color change on leather surface of the watch strap are different. Some are obvious(like light brown main image) . some are not(like dark brown main image).This watch strap is made of top grain calfskin leather. soft and comfortable. breathable and sweat proof. good hand feeling. Due to the characteristics of leather. we do not recommend using this strap when showering or swimming.Quick release spring bar version watch strap. disassembly and installation just need two seconds. no need tool. If your original watch strap uses normal spring bar. don’t worry. We also provide spring bar remover in the package.The watchbands size: 20mm. Watchbands color: black grey black buckle. Thickness: about 3mm. fit 140mm-205mm(5.5in-8in)wrist. but the diameter of the watch dial may also impact fit. Compatible with traditional or smart watch with 20mm watch lug size.The watch strap comes with 2 quick release spring bar and 1 spring bar remover. If you are not satisfied with the products. no matter what problem is. just email us. we will try our best to solve them.