Compatibility Compatible with Fitbit Inspire 2 & Fitbit Inspire HR & Fitbit Inspire & Fitbit Ace 2 (Not include any device / tracker)., the unique magnetic buckle unlocks for the best wearing experience and a beautiful professional look in any occasion. Material The replacement band is made of high quality stainless steel metal, sweat and water resistant material with venting holes. The stainless steel band is elegant, comfortable, flexible and durable. Easy to install High quality stainless steel mesh, polished edges, no tools required. Super easy to install, adjust and uninstall. Adjustable size The band seal allows you to choose the most comfortable size. The compact size fits the 5.5-8.1(140mm-205mm) wrist; the large size fits the 5.7-8.7(145mm-220mm) wrist. You can adjust it to fit your wrist. Warranty 12 months warranty and quality assurance. If you have any quality issues, please feel free to contact us.