For Huami Amazfit T-rex Ultra A2142 Silicone Watch Strap Adjustable Wrist Band - Black Made of high-quality silicone,comfortable to wear,easy to match with your daily outfit The material has no harm to human skin and is not allergic,and the watch buckle is made of premium material,which is durable There are various colors for options,you can choose your favorite one to meet different style needs Adopting a multiple holes design,the watch strap is convenient to adjust the size An ideal strap replacement for your old,broken one. Suitable for work,leisure occasions,or other daily occasions for women/men Specifications: Material: Silicone Length: 90mm+125mm Width: 22.2mm Wrist circumference: 5.5-8.7 inch Package included: 1 x Watch Strap 2 x Detach Tool Other items not included