It is made for use with the Series 1-9 or SE Apple Watch® & Apple Watch® Ultra and includes two interchangeable endpieces compatible with both 38/40/41mm and 42/44/45/49mm styles. Apple Watch® is a trademark of Apple, Inc. Also compatible with any Samsung Galaxy Watch® with 20mm straps. Compatible with - Series 1-9 or SE Apple Watch® & Apple Watch® Ultra 1-2 Custom fit for your 38/40/41mm and 42/44/45/49mm Apple Watch®. Band Material - Stainless Steel and Silicone Band Color - Barely Pink and Pink Closure Type - Bracelet Butterfly Deployant