1.Material Metal 2.Metal type Stainless Steel 3.Gem type No gemstone 4.[Compatible Model] stainless steel bands compatible with fitbit versa 3/versa 4/sense/sense 2,the package only include bands (the watch is not in) 5.[Adjustable Size] stainless steel fitbit versa 4 bands for woman can be adjusted in size. You can adjust the watch clips of your fit bit versa 3/versa 4/sense/sense 2 to the appropriate holes to adjust and finish wearing. It is suitable for 5.5-7.9 (140mm-200mm) wrist. The size is suitable and more comfortable to wear. 6.[Material Quality] fitbit versa 3 bands are made of selected high-quality steel strips, which are comfortable, breathable, soft and skin friendly. It won't scratch your clothes either. 7.[Unique Design] Fitbit versa 4 bands adopt a belt buckle style in appearance design, making it more convenient and concise to wear. It is also equipped with two stainless steel iron rings, which can lock your fitbit versa 3 bands according to any adjusted size.