[Our Quest for Excellence] - Your satisfaction is our best reward. Enjoy 18 months complimentary exchange or refund without return. Please contact our customer service team to serve you. [Easy Installation] - There are installation image and video on our product page and instruction is included in the package. Package included: 1* apple watch band, 1* removal tool kit, 1* instruction manual and more pins. Compatible for Apple Watch Ultra 2nd 49mm, apple watch series 9/8/7/SE2/6/5/4/3/2/1 45mm 44mm 42mm. [DLC Layer] - Used an additional diamond-like carbon (DLC) layer same with Apple's $449.00 Link Bracelet. Due to DLC technology requires the use of advanced manufacturing equipment and materials, as well as complex production processes, the machining cost is higher than traditional electroplating coatings. It's more wear-resistant and corrosion-resistant than traditional electroplating coatings, and also has higher hardness and better surface texture. [Titanium Link] - Weighing only 0.13 pounds, it is lightweight yet durable. With similar characteristics as stainless but weighs 50% less, is more corrosion-resistant. Titanium strikes the perfect balance between weight, ruggedness, and corrosion resistance. ?[Apple Watch Link Bracelet] - Crafted from the same aerospace-grade titanium as the apple watch ultra 49mm case, matching colorway with ultra. Update version for the Apple Watch series 9 8 7 specifically, it is also compatible with Apple Watch Ultra 2nd.