1, Material: 316 stainless steel + strong magnetic-2, Size: 20mm universal-3. Connection head: stainless steel, with quick release ears -4, loop-back buckle, convenient and fast, 1 second to wear-5. Delicate Milan pattern, comfortable feeling, adjust the length at will-6, Suitable for Samsung, Huawei, Xiaomi, vivo, OPPO, traditional watches, hoco. Y series and other 20mm flat direct port watches are universal